feat(i18n): Implement multilingual support with Polish and English translations

- Added translation context and provider for managing language state.
- Integrated translation functionality into existing components (TaskStatusDropdown, Navigation).
- Created LanguageSwitcher component for language selection.
- Updated task statuses and navigation labels to use translations.
- Added Polish translations for various UI elements, including navigation, tasks, projects, and contracts.
- Refactored utility functions to return localized strings for deadlines and date formatting.

src/app/admin/users/page.js

@@ -12,8 +12,10 @@ import PageContainer from "@/components/ui/PageContainer";
 import PageHeader from "@/components/ui/PageHeader";
 import { LoadingState } from "@/components/ui/States";
 import { formatDate } from "@/lib/utils";
+import { useTranslation } from "@/lib/i18n";
 
 export default function UserManagementPage() {
+	const { t } = useTranslation();
 	const [users, setUsers] = useState([]);
 	const [loading, setLoading] = useState(true);
 	const [error, setError] = useState("");
@@ -54,7 +56,7 @@ export default function UserManagementPage() {
 	};
 
 	const handleDeleteUser = async (userId) => {
-		if (!confirm("Are you sure you want to delete this user?")) return;
+		if (!confirm(t('admin.deleteUser') + "?")) return;
 
 		try {
 			const response = await fetch(`/api/admin/users/${userId}`, {
@@ -141,7 +143,7 @@ export default function UserManagementPage() {
 
 	return (
 		<PageContainer>
-			<PageHeader title="User Management" description="Manage system users and permissions">
+			<PageHeader title={t('admin.userManagement')} description={t('admin.subtitle')}>
 				<Button 
 					variant="primary" 
 					onClick={() => setShowCreateForm(true)}
@@ -149,7 +151,7 @@ export default function UserManagementPage() {
 					<svg className="w-5 h-5 mr-2" fill="none" stroke="currentColor" viewBox="0 0 24 24">
 						<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 4v16m8-8H4" />
 					</svg>
-					Add User
+					{t('admin.newUser')}
 				</Button>
 			</PageHeader>
 

src/app/contracts/page.js

@@ -11,8 +11,10 @@ import SearchBar from "@/components/ui/SearchBar";
 import FilterBar from "@/components/ui/FilterBar";
 import { LoadingState } from "@/components/ui/States";
 import { formatDate } from "@/lib/utils";
+import { useTranslation } from "@/lib/i18n";
 
 export default function ContractsMainPage() {
+	const { t } = useTranslation();
 	const [contracts, setContracts] = useState([]);
 	const [loading, setLoading] = useState(true);
 	const [searchTerm, setSearchTerm] = useState("");
@@ -133,13 +135,13 @@ export default function ContractsMainPage() {
 	const getStatusBadge = (status) => {
 		switch (status) {
 			case "active":
-				return <Badge variant="success">Aktywna</Badge>;
+				return <Badge variant="success">{t('contracts.active')}</Badge>;
 			case "completed":
-				return <Badge variant="secondary">Zakończona</Badge>;
+				return <Badge variant="secondary">{t('common.completed')}</Badge>;
 			case "ongoing":
-				return <Badge variant="primary">W trakcie</Badge>;
+				return <Badge variant="primary">{t('contracts.withoutEndDate')}</Badge>;
 			default:
-				return <Badge>Nieznany</Badge>;
+				return <Badge>{t('common.unknown')}</Badge>;
 		}
 	};
 
@@ -170,17 +172,17 @@ export default function ContractsMainPage() {
 		return (
 			<PageContainer>
 				<PageHeader
-					title="Umowy"
+					title={t('contracts.title')}
-					description="Zarządzaj swoimi umowami i kontraktami"
+					description={t('contracts.subtitle')}
 				>
 					<Link href="/contracts/new">
 						<Button variant="primary" size="lg">
 							<span className="mr-2">➕</span>
-							Nowa umowa
+							{t('contracts.newContract')}
 						</Button>
 					</Link>
 				</PageHeader>
-				<LoadingState message="Ładowanie umów..." />
+				<LoadingState message={t('navigation.loading')} />
 			</PageContainer>
 		);
 	}
@@ -225,13 +227,13 @@ export default function ContractsMainPage() {
 	return (
 		<PageContainer>
 			<PageHeader
-				title="Umowy"
+				title={t('contracts.title')}
-				description="Zarządzaj swoimi umowami i kontraktami"
+				description={t('contracts.subtitle')}
 			>
 				<Link href="/contracts/new">
 					<Button variant="primary" size="lg">
 						<span className="mr-2">➕</span>
-						Nowa umowa
+						{t('contracts.newContract')}
 					</Button>
 				</Link>{" "}
 			</PageHeader>

src/app/layout.js

@@ -2,6 +2,7 @@ import { Geist, Geist_Mono } from "next/font/google";
 import "./globals.css";
 import Navigation from "@/components/ui/Navigation";
 import { AuthProvider } from "@/components/auth/AuthProvider";
+import { TranslationProvider } from "@/lib/i18n";
 
 const geistSans = Geist({
 	variable: "--font-geist-sans",
@@ -14,20 +15,22 @@ const geistMono = Geist_Mono({
 });
 
 export const metadata = {
-	title: "Project Management Panel",
+	title: "Panel Zarządzania Projektami",
-	description: "Professional project management dashboard",
+	description: "Profesjonalny panel zarządzania projektami",
 };
 
 export default function RootLayout({ children }) {
 	return (
-		<html lang="en">
+		<html lang="pl">
 			<body
 				className={`${geistSans.variable} ${geistMono.variable} antialiased`}
 			>
-				<AuthProvider>
+				<TranslationProvider initialLanguage="pl">
-					<Navigation />
+					<AuthProvider>
-					<main>{children}</main>
+						<Navigation />
-				</AuthProvider>
+						<main>{children}</main>
+					</AuthProvider>
+				</TranslationProvider>
 			</body>
 		</html>
 	);

src/app/page.js

@@ -10,6 +10,7 @@ import TaskStatusDropdownSimple from "@/components/TaskStatusDropdownSimple";
 import PageContainer from "@/components/ui/PageContainer";
 import PageHeader from "@/components/ui/PageHeader";
 import { LoadingState } from "@/components/ui/States";
+import { useTranslation } from "@/lib/i18n";
 import {
 	differenceInCalendarDays,
 	parseISO,
@@ -26,6 +27,7 @@ import TaskStatusChart from "@/components/ui/TaskStatusChart";
 
 export default function Home() {
 	const { data: session, status } = useSession();
+	const { t } = useTranslation();
 	const [stats, setStats] = useState({
 		totalProjects: 0,
 		activeProjects: 0,
@@ -258,17 +260,17 @@ export default function Home() {
 		return (
 			<PageContainer>
 				<PageHeader
-					title="Dashboard"
+					title={t('dashboard.title')}
-					description="Overview of your projects, contracts, and tasks"
+					description={t('dashboard.subtitle')}
 				/>
-				<LoadingState message="Loading dashboard data..." />
+				<LoadingState message={t('common.loading')} />
 			</PageContainer>
 		);
 	}
 
 	// Show loading state while session is being fetched
 	if (status === "loading") {
-		return <LoadingState message="Loading authentication..." />;
+		return <LoadingState message={t('navigation.loading')} />;
 	}
 
 	// Show sign-in prompt if not authenticated
@@ -277,16 +279,16 @@ export default function Home() {
 			<PageContainer>
 				<div className="text-center py-12">
 					<h1 className="text-4xl font-bold text-gray-900 mb-6">
-						Welcome to Project Management Panel
+						Witamy w Panelu Zarządzania Projektami
 					</h1>
 					<p className="text-xl text-gray-600 mb-8">
-						Please sign in to access the project management system.
+						Zaloguj się, aby uzyskać dostęp do systemu zarządzania projektami.
 					</p>
 					<Link
 						href="/auth/signin"
 						className="inline-flex items-center px-6 py-3 border border-transparent text-base font-medium rounded-md text-white bg-blue-600 hover:bg-blue-700"
 					>
-						Sign In
+						{t('auth.signIn')}
 					</Link>
 				</div>
 			</PageContainer>
@@ -296,8 +298,8 @@ export default function Home() {
 	return (
 		<PageContainer>
 			<PageHeader
-				title={`Welcome back, ${session.user.name}!`}
+				title={`Witaj ponownie, ${session.user.name}!`}
-				description="Overview of your projects, contracts, and tasks"
+				description={t('dashboard.subtitle')}
 			>
 				<div className="flex items-center gap-3">
 					<Link href="/projects/new">
@@ -315,7 +317,7 @@ export default function Home() {
 									d="M12 4v16m8-8H4"
 								/>
 							</svg>
-							New Project
+							{t('projects.newProject')}
 						</Button>
 					</Link>
 					<Link href="/contracts/new">
@@ -333,7 +335,7 @@ export default function Home() {
 									d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"
 								/>
 							</svg>
-							New Contract
+							{t('contracts.newContract')}
 						</Button>
 					</Link>
 				</div>
@@ -347,13 +349,13 @@ export default function Home() {
 						<div className="flex items-center justify-between">
 							<div>
 								<p className="text-xs font-medium text-gray-600 uppercase tracking-wide">
-									Total Projects
+									{t('dashboard.totalProjects')}
 								</p>
 								<p className="text-2xl font-bold text-gray-900">
 									{stats.totalProjects}
 								</p>
 								<p className="text-xs text-green-600 mt-1">
-									{stats.activeProjects} active
+									{stats.activeProjects} {t('dashboard.activeProjects').toLowerCase()}
 								</p>
 							</div>
 							<div className="w-10 h-10 bg-blue-100 rounded-lg flex items-center justify-center">
@@ -380,13 +382,13 @@ export default function Home() {
 						<div className="flex items-center justify-between">
 							<div>
 								<p className="text-xs font-medium text-gray-600 uppercase tracking-wide">
-									Contracts
+									{t('dashboard.totalContracts')}
 								</p>
 								<p className="text-2xl font-bold text-gray-900">
 									{stats.totalContracts}
 								</p>
 								<p className="text-xs text-green-600 mt-1">
-									{stats.activeContracts} active
+									{stats.activeContracts} {t('dashboard.activeContracts').toLowerCase()}
 								</p>
 							</div>
 							<div className="w-10 h-10 bg-green-100 rounded-lg flex items-center justify-center">
@@ -413,12 +415,12 @@ export default function Home() {
 						<div className="flex items-center justify-between">
 							<div>
 								<p className="text-xs font-medium text-gray-600 uppercase tracking-wide">
-									Pending Tasks
+									{t('dashboard.pendingTasks')}
 								</p>
 								<p className="text-2xl font-bold text-gray-900">
 									{stats.pendingTasks}
 								</p>
-								<p className="text-xs text-gray-500 mt-1">Awaiting start</p>
+								<p className="text-xs text-gray-500 mt-1">Oczekują rozpoczęcia</p>
 							</div>
 							<div className="w-10 h-10 bg-yellow-100 rounded-lg flex items-center justify-center">
 								<svg
@@ -444,12 +446,12 @@ export default function Home() {
 						<div className="flex items-center justify-between">
 							<div>
 								<p className="text-xs font-medium text-gray-600 uppercase tracking-wide">
-									In Progress
+									{t('dashboard.inProgressTasks')}
 								</p>
 								<p className="text-2xl font-bold text-gray-900">
 									{stats.inProgressTasks}
 								</p>
-								<p className="text-xs text-blue-600 mt-1">Active tasks</p>
+								<p className="text-xs text-blue-600 mt-1">Aktywne zadania</p>
 							</div>
 							<div className="w-10 h-10 bg-blue-100 rounded-lg flex items-center justify-center">
 								<svg
@@ -475,12 +477,12 @@ export default function Home() {
 						<div className="flex items-center justify-between">
 							<div>
 								<p className="text-xs font-medium text-gray-600 uppercase tracking-wide">
-									Completed
+									{t('dashboard.completedTasks')}
 								</p>
 								<p className="text-2xl font-bold text-gray-900">
 									{stats.completedTasks}
 								</p>
-								<p className="text-xs text-green-600 mt-1">Tasks done</p>
+								<p className="text-xs text-green-600 mt-1">Zadania wykonane</p>
 							</div>
 							<div className="w-10 h-10 bg-green-100 rounded-lg flex items-center justify-center">
 								<svg

src/app/projects/[id]/page.js

@@ -25,9 +25,9 @@ export default async function ProjectViewPage({ params }) {
 			<PageContainer>
 				<Card>
 					<CardContent className="text-center py-8">
-						<p className="text-red-600 text-lg">Project not found.</p>
+						<p className="text-red-600 text-lg">Projekt nie został znaleziony.</p>
 						<Link href="/projects" className="mt-4 inline-block">
-							<Button variant="primary">Back to Projects</Button>
+							<Button variant="primary">Powrót do projektów</Button>
 						</Link>
 					</CardContent>
 				</Card>
@@ -55,10 +55,10 @@ export default async function ProjectViewPage({ params }) {
 						{daysRemaining !== null && (
 							<Badge variant={getDeadlineVariant(daysRemaining)} size="md">
 								{daysRemaining === 0
-									? "Due Today"
+									? "Termin dzisiaj"
 									: daysRemaining > 0
-									? `${daysRemaining} days left`
+									? `${daysRemaining} dni pozostało`
-									: `${Math.abs(daysRemaining)} days overdue`}
+									: `${Math.abs(daysRemaining)} dni po terminie`}
 							</Badge>
 						)}
 						<Link href="/projects">
@@ -76,7 +76,7 @@ export default async function ProjectViewPage({ params }) {
 										d="M15 19l-7-7 7-7"
 									/>
 								</svg>
-								Back to Projects
+								Powrót do projektów
 							</Button>
 						</Link>
 						<Link href={`/projects/${id}/edit`}>
@@ -94,7 +94,7 @@ export default async function ProjectViewPage({ params }) {
 										d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"
 									/>
 								</svg>
-								Edit Project
+								Edytuj projekt
 							</Button>
 						</Link>
 					</div>
@@ -108,7 +108,7 @@ export default async function ProjectViewPage({ params }) {
 							{" "}
 							<div className="flex items-center justify-between">
 								<h2 className="text-xl font-semibold text-gray-900">
-									Project Information
+									Informacje o projekcie
 								</h2>
 								<Badge
 									variant={
@@ -123,12 +123,12 @@ export default async function ProjectViewPage({ params }) {
 									size="sm"
 								>
 									{project.project_type === "design"
-										? "Design (P)"
+										? "Projektowanie (P)"
 										: project.project_type === "construction"
-										? "Construction (R)"
+										? "Realizacja (R)"
 										: project.project_type === "design+construction"
-										? "Design + Construction (P+R)"
+										? "Projektowanie + Realizacja (P+R)"
-										: "Unknown"}
+										: "Nieznany"}
 								</Badge>
 							</div>
 						</CardHeader>
@@ -136,7 +136,7 @@ export default async function ProjectViewPage({ params }) {
 							<div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
 								<div>
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Location
+										Lokalizacja
 									</span>
 									<p className="text-gray-900 font-medium">
 										{project.city || "N/A"}
@@ -144,7 +144,7 @@ export default async function ProjectViewPage({ params }) {
 								</div>
 								<div>
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Address
+										Adres
 									</span>
 									<p className="text-gray-900 font-medium">
 										{project.address || "N/A"}
@@ -152,7 +152,7 @@ export default async function ProjectViewPage({ params }) {
 								</div>
 								<div>
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Plot
+										Działka
 									</span>
 									<p className="text-gray-900 font-medium">
 										{project.plot || "N/A"}
@@ -160,7 +160,7 @@ export default async function ProjectViewPage({ params }) {
 								</div>
 								<div>
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										District
+										Dzielnica
 									</span>
 									<p className="text-gray-900 font-medium">
 										{project.district || "N/A"}
@@ -168,7 +168,7 @@ export default async function ProjectViewPage({ params }) {
 								</div>
 								<div>
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Unit
+										Jednostka
 									</span>
 									<p className="text-gray-900 font-medium">
 										{project.unit || "N/A"}
@@ -176,7 +176,7 @@ export default async function ProjectViewPage({ params }) {
 								</div>{" "}
 								<div>
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Deadline
+										Termin zakończenia
 									</span>
 									<p className="text-gray-900 font-medium">
 										{project.finish_date
@@ -194,7 +194,7 @@ export default async function ProjectViewPage({ params }) {
 								</div>
 								<div>
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Investment Number
+										Numer inwestycji
 									</span>
 									<p className="text-gray-900 font-medium">
 										{project.investment_number || "N/A"}
@@ -205,7 +205,7 @@ export default async function ProjectViewPage({ params }) {
 							{project.contact && (
 								<div className="border-t pt-4">
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Contact
+										Kontakt
 									</span>
 									<p className="text-gray-900 font-medium">{project.contact}</p>
 								</div>
@@ -214,7 +214,7 @@ export default async function ProjectViewPage({ params }) {
 							{project.coordinates && (
 								<div className="border-t pt-4">
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Coordinates
+										Współrzędne
 									</span>
 									<p className="text-gray-900 font-medium font-mono text-sm">
 										{formatCoordinates(project.coordinates)}
@@ -237,14 +237,14 @@ export default async function ProjectViewPage({ params }) {
 					<Card>
 						<CardHeader>
 							<h2 className="text-xl font-semibold text-gray-900">
-								Contract Details
+								Szczegóły umowy
 							</h2>
 						</CardHeader>
 						<CardContent className="space-y-4">
 							<div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
 								<div>
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Contract Number
+										Numer umowy
 									</span>
 									<p className="text-gray-900 font-medium">
 										{project.contract_number || "N/A"}
@@ -252,7 +252,7 @@ export default async function ProjectViewPage({ params }) {
 								</div>
 								<div>
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Contract Name
+										Nazwa umowy
 									</span>
 									<p className="text-gray-900 font-medium">
 										{project.contract_name || "N/A"}
@@ -260,7 +260,7 @@ export default async function ProjectViewPage({ params }) {
 								</div>
 								<div>
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Customer
+										Klient
 									</span>
 									<p className="text-gray-900 font-medium">
 										{project.customer || "N/A"}
@@ -268,7 +268,7 @@ export default async function ProjectViewPage({ params }) {
 								</div>
 								<div>
 									<span className="text-sm font-medium text-gray-500 block mb-1">
-										Investor
+										Inwestor
 									</span>
 									<p className="text-gray-900 font-medium">
 										{project.investor || "N/A"}
@@ -284,21 +284,21 @@ export default async function ProjectViewPage({ params }) {
 					<Card>
 						<CardHeader>
 							<h2 className="text-lg font-semibold text-gray-900">
-								Project Status
+								Status projektu
 							</h2>
 						</CardHeader>
 						<CardContent className="space-y-4">
 							{" "}
 							<div>
 								<span className="text-sm font-medium text-gray-500 block mb-2">
-									Current Status
+									Aktualny status
 								</span>
 								<ProjectStatusDropdown project={project} size="md" />
 							</div>
 							{daysRemaining !== null && (
 								<div className="border-t pt-4">
 									<span className="text-sm font-medium text-gray-500 block mb-2">
-										Timeline
+										Harmonogram
 									</span>
 									<div className="text-center">
 										<Badge
@@ -306,10 +306,10 @@ export default async function ProjectViewPage({ params }) {
 											size="lg"
 										>
 											{daysRemaining === 0
-												? "Due Today"
+												? "Termin dzisiaj"
 												: daysRemaining > 0
-												? `${daysRemaining} days remaining`
+												? `${daysRemaining} dni pozostało`
-												: `${Math.abs(daysRemaining)} days overdue`}
+												: `${Math.abs(daysRemaining)} dni po terminie`}
 										</Badge>
 									</div>
 								</div>
@@ -321,7 +321,7 @@ export default async function ProjectViewPage({ params }) {
 					<Card>
 						<CardHeader>
 							<h2 className="text-lg font-semibold text-gray-900">
-								Quick Actions
+								Szybkie akcje
 							</h2>
 						</CardHeader>
 						<CardContent className="space-y-3">
@@ -344,7 +344,7 @@ export default async function ProjectViewPage({ params }) {
 											d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"
 										/>
 									</svg>
-									Edit Project
+									Edytuj projekt
 								</Button>
 							</Link>{" "}
 							<Link href="/projects" className="block">
@@ -366,7 +366,7 @@ export default async function ProjectViewPage({ params }) {
 											d="M15 19l-7-7 7-7"
 										/>
 									</svg>
-									Back to Projects
+									Powrót do projektów
 								</Button>
 							</Link>
 							<Link href="/projects/map" className="block">
@@ -388,7 +388,7 @@ export default async function ProjectViewPage({ params }) {
 											d="M9 20l-5.447-2.724A1 1 0 013 16.382V5.618a1 1 0 011.447-.894L9 7m0 13l6-3m-6 3V7m6 10l4.553 2.276A1 1 0 0021 18.382V7.618a1 1 0 00-1.447-.894L15 4m0 13V4m0 0L9 7"
 										/>
 									</svg>
-									View All on Map
+									Zobacz wszystkie na mapie
 								</Button>
 							</Link>
 						</CardContent>
@@ -404,7 +404,7 @@ export default async function ProjectViewPage({ params }) {
 							{" "}
 							<div className="flex items-center justify-between">
 								<h2 className="text-xl font-semibold text-gray-900">
-									Project Location
+									Lokalizacja projektu
 								</h2>
 								{project.coordinates && (
 									<Link
@@ -428,7 +428,7 @@ export default async function ProjectViewPage({ params }) {
 													d="M9 20l-5.447-2.724A1 1 0 013 16.382V5.618a1 1 0 011.447-.894L9 7m0 13l6-3m-6 3V7m6 10l4.553 2.276A1 1 0 0021 18.382V7.618a1 1 0 00-1.447-.894L15 4m0 13V4m0 0L9 7"
 												/>
 											</svg>
-											View on Full Map
+											Zobacz na pełnej mapie
 										</Button>
 									</Link>
 								)}
@@ -454,7 +454,7 @@ export default async function ProjectViewPage({ params }) {
 			{/* Notes Section */}
 			<Card>
 				<CardHeader>
-					<h2 className="text-xl font-semibold text-gray-900">Notes</h2>
+					<h2 className="text-xl font-semibold text-gray-900">Notatki</h2>
 				</CardHeader>
 				<CardContent>
 					<div className="mb-6">
@@ -475,10 +475,10 @@ export default async function ProjectViewPage({ params }) {
 								</svg>
 							</div>
 							<h3 className="text-lg font-medium text-gray-900 mb-2">
-								No notes yet
+								Brak notatek
 							</h3>
 							<p className="text-gray-500">
-								Add your first note using the form above.
+								Dodaj swoją pierwszą notatkę używając formularza powyżej.
 							</p>
 						</div>
 					) : (

src/app/projects/page.js

@@ -11,8 +11,10 @@ import PageHeader from "@/components/ui/PageHeader";
 import SearchBar from "@/components/ui/SearchBar";
 import { LoadingState } from "@/components/ui/States";
 import { formatDate } from "@/lib/utils";
+import { useTranslation } from "@/lib/i18n";
 
 export default function ProjectListPage() {
+	const { t } = useTranslation();
 	const [projects, setProjects] = useState([]);
 	const [searchTerm, setSearchTerm] = useState("");
 	const [filteredProjects, setFilteredProjects] = useState([]);
@@ -45,7 +47,7 @@ export default function ProjectListPage() {
 	}, [searchTerm, projects]);
 
 	async function handleDelete(id) {
-		const confirmed = confirm("Are you sure you want to delete this project?");
+		const confirmed = confirm(t('projects.deleteConfirm'));
 		if (!confirmed) return;
 
 		const res = await fetch(`/api/projects/${id}`, {
@@ -61,7 +63,7 @@ export default function ProjectListPage() {
 	};
 	return (
 		<PageContainer>
-			<PageHeader title="Projects" description="Manage and track your projects">
+			<PageHeader title={t('projects.title')} description={t('projects.subtitle')}>
 				<div className="flex gap-2">
 					<Link href="/projects/map">
 						<Button variant="outline" size="lg">
@@ -78,7 +80,7 @@ export default function ProjectListPage() {
 									d="M9 20l-5.447-2.724A1 1 0 013 16.382V5.618a1 1 0 011.447-.894L9 7m0 13l6-3m-6 3V7m6 10l4.553 2.276A1 1 0 0021 18.382V7.618a1 1 0 00-.553-.894L15 4m0 13V4m0 0L9 7"
 								/>
 							</svg>
-							Map View
+							Widok mapy
 						</Button>
 					</Link>
 					<Link href="/projects/new">
@@ -96,7 +98,7 @@ export default function ProjectListPage() {
 									d="M12 4v16m8-8H4"
 								/>
 							</svg>
-							Add Project
+							{t('projects.newProject')}
 						</Button>
 					</Link>
 				</div>
@@ -105,9 +107,9 @@ export default function ProjectListPage() {
 			<SearchBar
 				searchTerm={searchTerm}
 				onSearchChange={handleSearchChange}
-				placeholder="Search by project name, WP, plot, or investment number..."
+				placeholder={t('projects.searchPlaceholder')}
 				resultsCount={filteredProjects.length}
-				resultsText="projects"
+				resultsText="projektów"
 			/>
 			{filteredProjects.length === 0 && searchTerm ? (
 				<Card>
@@ -126,14 +128,13 @@ export default function ProjectListPage() {
 							</svg>
 						</div>
 						<h3 className="text-lg font-medium text-gray-900 mb-2">
-							No projects found
+							{t('common.noResults')}
 						</h3>
 						<p className="text-gray-500 mb-6">
-							No projects match your search criteria. Try adjusting your search
+							Brak projektów pasujących do kryteriów wyszukiwania. Spróbuj zmienić wyszukiwane frazy.
-							terms.
 						</p>
 						<Button variant="outline" onClick={() => setSearchTerm("")}>
-							Clear Search
+							Wyczyść wyszukiwanie
 						</Button>
 					</CardContent>
 				</Card>
@@ -154,13 +155,13 @@ export default function ProjectListPage() {
 							</svg>
 						</div>
 						<h3 className="text-lg font-medium text-gray-900 mb-2">
-							No projects yet
+							{t('projects.noProjects')}
 						</h3>
 						<p className="text-gray-500 mb-6">
-							Get started by creating your first project
+							{t('projects.noProjectsMessage')}
 						</p>
 						<Link href="/projects/new">
-							<Button variant="primary">Create First Project</Button>
+							<Button variant="primary">Utwórz pierwszy projekt</Button>
 						</Link>
 					</CardContent>
 				</Card>
@@ -170,34 +171,34 @@ export default function ProjectListPage() {
 						<thead>
 							<tr className="bg-gray-100 border-b">
 								<th className="text-left px-2 py-3 font-semibold text-xs text-gray-700 w-32">
-									No.
+									Nr.
 								</th>
 								<th className="text-left px-2 py-3 font-semibold text-xs text-gray-700">
-									Project Name
+									{t('projects.projectName')}
 								</th>
 								<th className="text-left px-2 py-3 font-semibold text-xs text-gray-700 w-40">
 									WP
 								</th>
 								<th className="text-left px-2 py-3 font-semibold text-xs text-gray-700 w-20">
-									City
+									{t('projects.city')}
 								</th>
 								<th className="text-left px-2 py-3 font-semibold text-xs text-gray-700 w-40">
-									Address
+									{t('projects.address')}
 								</th>
 								<th className="text-left px-2 py-3 font-semibold text-xs text-gray-700 w-20">
-									Plot
+									{t('projects.plot')}
 								</th>
 								<th className="text-left px-2 py-3 font-semibold text-xs text-gray-700 w-24">
-									Finish
+									{t('projects.finishDate')}
 								</th>
 								<th className="text-left px-2 py-3 font-semibold text-xs text-gray-700 w-12">
-									Type
+									Typ
 								</th>
 								<th className="text-left px-2 py-3 font-semibold text-xs text-gray-700 w-24">
 									Status
 								</th>
 								<th className="text-left px-2 py-3 font-semibold text-xs text-gray-700 w-20">
-									Actions
+									Akcje
 								</th>
 							</tr>
 						</thead>
@@ -282,7 +283,7 @@ export default function ProjectListPage() {
 												size="sm"
 												className="text-xs px-2 py-1"
 											>
-												View
+												Wyświetl
 											</Button>
 										</Link>
 									</td>

src/app/tasks/page.js

@@ -14,8 +14,10 @@ import PageHeader from "@/components/ui/PageHeader";
 import SearchBar from "@/components/ui/SearchBar";
 import FilterBar from "@/components/ui/FilterBar";
 import { LoadingState } from "@/components/ui/States";
+import { useTranslation } from "@/lib/i18n";
 
 export default function ProjectTasksPage() {
+	const { t } = useTranslation();
 	const [allTasks, setAllTasks] = useState([]);
 	const [filteredTasks, setFilteredTasks] = useState([]);
 	const [searchTerm, setSearchTerm] = useState("");
@@ -148,25 +150,25 @@ export default function ProjectTasksPage() {
 
 	const filterOptions = [
 		{
-			label: "Status",
+			label: t('tasks.status'),
 			value: statusFilter,
 			onChange: (e) => setStatusFilter(e.target.value),
 			options: [
-				{ value: "all", label: "All" },
+				{ value: "all", label: t('common.all') },
-				{ value: "pending", label: "Pending" },
+				{ value: "pending", label: t('taskStatus.pending') },
-				{ value: "in_progress", label: "In Progress" },
+				{ value: "in_progress", label: t('taskStatus.in_progress') },
-				{ value: "completed", label: "Completed" },
+				{ value: "completed", label: t('taskStatus.completed') },
 			],
 		},
 		{
-			label: "Priority",
+			label: t('tasks.priority'),
 			value: priorityFilter,
 			onChange: (e) => setPriorityFilter(e.target.value),
 			options: [
-				{ value: "all", label: "All" },
+				{ value: "all", label: t('common.all') },
-				{ value: "high", label: "High" },
+				{ value: "high", label: t('tasks.high') },
-				{ value: "normal", label: "Normal" },
+				{ value: "normal", label: t('tasks.medium') },
-				{ value: "low", label: "Low" },
+				{ value: "low", label: t('tasks.low') },
 			],
 		},
 	];
@@ -174,8 +176,8 @@ export default function ProjectTasksPage() {
 	return (
 		<PageContainer>
 			<PageHeader
-				title="Project Tasks"
+				title={t('tasks.title')}
-				description="Monitor and manage tasks across all projects"
+				description={t('tasks.subtitle')}
 			/>
 			<SearchBar
 				searchTerm={searchTerm}
@@ -206,7 +208,7 @@ export default function ProjectTasksPage() {
 								</svg>
 							</div>
 							<div className="ml-4">
-								<p className="text-sm font-medium text-gray-600">Total Tasks</p>
+								<p className="text-sm font-medium text-gray-600">{t('dashboard.totalTasks')}</p>
 								<p className="text-2xl font-bold text-gray-900">
 									{statusCounts.all}
 								</p>
@@ -233,7 +235,7 @@ export default function ProjectTasksPage() {
 								</svg>
 							</div>
 							<div className="ml-4">
-								<p className="text-sm font-medium text-gray-600">Pending</p>
+								<p className="text-sm font-medium text-gray-600">{t('taskStatus.pending')}</p>
 								<p className="text-2xl font-bold text-gray-900">
 									{statusCounts.pending}
 								</p>
@@ -260,7 +262,7 @@ export default function ProjectTasksPage() {
 								</svg>
 							</div>
 							<div className="ml-4">
-								<p className="text-sm font-medium text-gray-600">In Progress</p>
+								<p className="text-sm font-medium text-gray-600">{t('taskStatus.in_progress')}</p>
 								<p className="text-2xl font-bold text-gray-900">
 									{statusCounts.in_progress}
 								</p>
@@ -287,7 +289,7 @@ export default function ProjectTasksPage() {
 								</svg>
 							</div>
 							<div className="ml-4">
-								<p className="text-sm font-medium text-gray-600">Completed</p>
+								<p className="text-sm font-medium text-gray-600">{t('taskStatus.completed')}</p>
 								<p className="text-2xl font-bold text-gray-900">
 									{statusCounts.completed}
 								</p>

src/components/NoteForm.js

@@ -1,8 +1,10 @@
 "use client";
 
 import React, { useState } from "react";
+import { useTranslation } from "@/lib/i18n";
 
 export default function NoteForm({ projectId }) {
+	const { t } = useTranslation();
 	const [note, setNote] = useState("");
 	const [status, setStatus] = useState(null);
 
@@ -17,10 +19,10 @@ export default function NoteForm({ projectId }) {
 
 		if (res.ok) {
 			setNote("");
-			setStatus("Note added");
+			setStatus(t("common.addNoteSuccess"));
 			window.location.reload();
 		} else {
-			setStatus("Failed to save note");
+			setStatus(t("common.addNoteError"));
 		}
 	}
 
@@ -29,7 +31,7 @@ export default function NoteForm({ projectId }) {
 			<textarea
 				value={note}
 				onChange={(e) => setNote(e.target.value)}
-				placeholder="Add a new note..."
+				placeholder={t("common.addNotePlaceholder")}
 				className="border p-2 w-full"
 				rows={3}
 				required
@@ -38,7 +40,7 @@ export default function NoteForm({ projectId }) {
 				type="submit"
 				className="bg-blue-600 text-white px-4 py-2 rounded"
 			>
-				Add Note
+				{t("common.addNote")}
 			</button>
 			{status && <p className="text-sm text-gray-600">{status}</p>}
 		</form>

src/components/ProjectForm.js

@@ -6,8 +6,10 @@ import { Card, CardHeader, CardContent } from "@/components/ui/Card";
 import Button from "@/components/ui/Button";
 import { Input } from "@/components/ui/Input";
 import { formatDateForInput } from "@/lib/utils";
+import { useTranslation } from "@/lib/i18n";
 
 export default function ProjectForm({ initialData = null }) {
+	const { t } = useTranslation();
 	const [form, setForm] = useState({
 		contract_id: "",
 		project_name: "",
@@ -146,7 +148,7 @@ export default function ProjectForm({ initialData = null }) {
 
 						<div>
 							<label className="block text-sm font-medium text-gray-700 mb-2">
-								Project Type <span className="text-red-500">*</span>
+								Typ projektu <span className="text-red-500">*</span>
 							</label>
 							<select
 								name="project_type"
@@ -155,17 +157,17 @@ export default function ProjectForm({ initialData = null }) {
 								className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-blue-500 focus:border-blue-500"
 								required
 							>
-								<option value="design">Design (Projektowanie)</option>
+								<option value="design">{t('projectType.design')}</option>
-								<option value="construction">Construction (Realizacja)</option>
+								<option value="construction">{t('projectType.construction')}</option>
 								<option value="design+construction">
-									Design + Construction (Projektowanie + Realizacja)
+									{t('projectType.design+construction')}
 								</option>
 							</select>
 						</div>
 
 						<div>
 							<label className="block text-sm font-medium text-gray-700 mb-2">
-								Assigned To
+								{t('projects.assignedTo')}
 							</label>
 							<select
 								name="assigned_to"
@@ -173,7 +175,7 @@ export default function ProjectForm({ initialData = null }) {
 								onChange={handleChange}
 								className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-blue-500 focus:border-blue-500"
 							>
-								<option value="">Unassigned</option>
+								<option value="">{t('projects.unassigned')}</option>
 								{users.map((user) => (
 									<option key={user.id} value={user.id}>
 										{user.name} ({user.email})
@@ -186,92 +188,92 @@ export default function ProjectForm({ initialData = null }) {
 					{/* Basic Information Section */}
 					<div className="border-t pt-6">
 						<h3 className="text-lg font-medium text-gray-900 mb-4">
-							Basic Information
+							{t('projects.basicInformation')}
 						</h3>
 						<div className="grid grid-cols-1 md:grid-cols-2 gap-6">
 							<div className="md:col-span-2">
 								<label className="block text-sm font-medium text-gray-700 mb-2">
-									Project Name <span className="text-red-500">*</span>
+									{t('projects.projectName')} <span className="text-red-500">*</span>
 								</label>
 								<Input
 									type="text"
 									name="project_name"
 									value={form.project_name || ""}
 									onChange={handleChange}
-									placeholder="Enter project name"
+									placeholder={t('projects.enterProjectName')}
 									required
 								/>
 							</div>
 
 							<div>
 								<label className="block text-sm font-medium text-gray-700 mb-2">
-									City
+									{t('projects.city')}
 								</label>
 								<Input
 									type="text"
 									name="city"
 									value={form.city || ""}
 									onChange={handleChange}
-									placeholder="Enter city"
+									placeholder={t('projects.enterCity')}
 								/>
 							</div>
 
 							<div>
 								<label className="block text-sm font-medium text-gray-700 mb-2">
-									Address
+									{t('projects.address')}
 								</label>
 								<Input
 									type="text"
 									name="address"
 									value={form.address || ""}
 									onChange={handleChange}
-									placeholder="Enter address"
+									placeholder={t('projects.enterAddress')}
 								/>
 							</div>
 
 							<div>
 								<label className="block text-sm font-medium text-gray-700 mb-2">
-									Plot
+									{t('projects.plot')}
 								</label>
 								<Input
 									type="text"
 									name="plot"
 									value={form.plot || ""}
 									onChange={handleChange}
-									placeholder="Enter plot number"
+									placeholder={t('projects.enterPlotNumber')}
 								/>
 							</div>
 
 							<div>
 								<label className="block text-sm font-medium text-gray-700 mb-2">
-									District
+									{t('projects.district')}
 								</label>
 								<Input
 									type="text"
 									name="district"
 									value={form.district || ""}
 									onChange={handleChange}
-									placeholder="Enter district"
+									placeholder={t('projects.enterDistrict')}
 								/>
 							</div>
 
 							<div>
 								<label className="block text-sm font-medium text-gray-700 mb-2">
-									Unit
+									{t('projects.unit')}
 								</label>
 								<Input
 									type="text"
 									name="unit"
 									value={form.unit || ""}
 									onChange={handleChange}
-									placeholder="Enter unit"
+									placeholder={t('projects.enterUnit')}
 								/>
 							</div>
 
 							<div>
 								<label className="block text-sm font-medium text-gray-700 mb-2">
-									Finish Date
+									{t('projects.finishDate')}
-								</label>{" "}
+								</label>
 								<Input
 									type="date"
 									name="finish_date"
@@ -316,33 +318,33 @@ export default function ProjectForm({ initialData = null }) {
 
 							<div className="md:col-span-2">
 								<label className="block text-sm font-medium text-gray-700 mb-2">
-									Contact Information
+									{t('projects.contact')}
 								</label>
 								<Input
 									type="text"
 									name="contact"
 									value={form.contact || ""}
 									onChange={handleChange}
-									placeholder="Enter contact details"
+									placeholder={t('projects.placeholders.contact')}
 								/>
 							</div>
 
 							<div className="md:col-span-2">
 								<label className="block text-sm font-medium text-gray-700 mb-2">
-									Coordinates
+									{t('projects.coordinates')}
 								</label>
 								<Input
 									type="text"
 									name="coordinates"
 									value={form.coordinates || ""}
 									onChange={handleChange}
-									placeholder="e.g., 49.622958,20.629562"
+									placeholder={t('projects.placeholders.coordinates')}
 								/>
 							</div>
 
 							<div className="md:col-span-2">
 								<label className="block text-sm font-medium text-gray-700 mb-2">
-									Notes
+									{t('projects.notes')}
 								</label>
 								<textarea
 									name="notes"
@@ -350,7 +352,7 @@ export default function ProjectForm({ initialData = null }) {
 									onChange={handleChange}
 									rows={4}
 									className="w-full px-3 py-2 border border-gray-300 rounded-md shadow-sm focus:outline-none focus:ring-blue-500 focus:border-blue-500"
-									placeholder="Enter any additional notes"
+									placeholder={t('projects.placeholders.notes')}
 								/>
 							</div>
 						</div>
@@ -364,7 +366,7 @@ export default function ProjectForm({ initialData = null }) {
 							onClick={() => router.back()}
 							disabled={loading}
 						>
-							Cancel
+							{t('common.cancel')}
 						</Button>
 						<Button type="submit" variant="primary" disabled={loading}>
 							{loading ? (
@@ -389,7 +391,7 @@ export default function ProjectForm({ initialData = null }) {
 											d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"
 										></path>
 									</svg>
-									{isEdit ? "Updating..." : "Creating..."}
+									{isEdit ? t('projects.updating') : t('projects.creating')}
 								</>
 							) : (
 								<>
@@ -408,7 +410,7 @@ export default function ProjectForm({ initialData = null }) {
 													d="M5 13l4 4L19 7"
 												/>
 											</svg>
-											Update Project
+											{t('projects.updateProject')}
 										</>
 									) : (
 										<>
@@ -425,7 +427,7 @@ export default function ProjectForm({ initialData = null }) {
 													d="M12 4v16m8-8H4"
 												/>
 											</svg>
-											Create Project
+											{t('projects.createProject')}
 										</>
 									)}
 								</>

src/components/ProjectStatusDropdown.js

@@ -3,12 +3,14 @@
 import { useState, useEffect, useRef } from "react";
 import { createPortal } from "react-dom";
 import Badge from "@/components/ui/Badge";
+import { useTranslation } from "@/lib/i18n";
 
 export default function ProjectStatusDropdown({
 	project,
 	size = "md",
 	showDropdown = true,
 }) {
+	const { t } = useTranslation();
 	const [status, setStatus] = useState(project.project_status);
 	const [loading, setLoading] = useState(false);
 	const [isOpen, setIsOpen] = useState(false);
@@ -21,19 +23,19 @@ export default function ProjectStatusDropdown({
 
 	const statusConfig = {
 		registered: {
-			label: "Registered",
+			label: t("projectStatus.registered"),
 			variant: "secondary",
 		},
 		in_progress_design: {
-			label: "In Progress (Design)",
+			label: t("projectStatus.in_progress_design"),
 			variant: "primary",
 		},
 		in_progress_construction: {
-			label: "In Progress (Construction)",
+			label: t("projectStatus.in_progress_construction"),
 			variant: "primary",
 		},
 		fulfilled: {
-			label: "Completed",
+			label: t("projectStatus.fulfilled"),
 			variant: "success",
 		},
 	};

src/components/ProjectTasksSection.js

@@ -7,8 +7,10 @@ import { Card, CardHeader, CardContent } from "./ui/Card";
 import Button from "./ui/Button";
 import Badge from "./ui/Badge";
 import { formatDate } from "@/lib/utils";
+import { useTranslation } from "@/lib/i18n";
 
 export default function ProjectTasksSection({ projectId }) {
+	const { t } = useTranslation();
 	const [projectTasks, setProjectTasks] = useState([]);
 	const [loading, setLoading] = useState(true);
 	const [taskNotes, setTaskNotes] = useState({});
@@ -180,14 +182,14 @@ export default function ProjectTasksSection({ projectId }) {
 			if (res.ok) {
 				refetchTasks(); // Refresh the list
 			} else {
-				alert("Failed to update task status");
+				alert(t("errors.generic"));
 			}
 		} catch (error) {
-			alert("Error updating task status");
+			alert(t("errors.generic"));
 		}
 	};
 	const handleDeleteTask = async (taskId) => {
-		if (!confirm("Are you sure you want to delete this task?")) return;
+		if (!confirm(t("common.deleteConfirm"))) return;
 		try {
 			const res = await fetch(`/api/project-tasks/${taskId}`, {
 				method: "DELETE",
@@ -197,7 +199,7 @@ export default function ProjectTasksSection({ projectId }) {
 				refetchTasks(); // Refresh the list
 			} else {
 				const errorData = await res.json();
-				alert("Failed to delete task: " + (errorData.error || "Unknown error"));
+				alert(t("errors.generic") + ": " + (errorData.error || t("errors.unknown")));
 			}
 		} catch (error) {
 			alert("Error deleting task: " + error.message);
@@ -227,10 +229,10 @@ export default function ProjectTasksSection({ projectId }) {
 				setTaskNotes((prev) => ({ ...prev, [taskId]: notes }));
 				setNewNote((prev) => ({ ...prev, [taskId]: "" }));
 			} else {
-				alert("Failed to add note");
+				alert(t("errors.generic"));
 			}
 		} catch (error) {
-			alert("Error adding note");
+			alert(t("errors.generic"));
 		} finally {
 			setLoadingNotes((prev) => ({ ...prev, [taskId]: false }));
 		}
@@ -278,10 +280,10 @@ export default function ProjectTasksSection({ projectId }) {
 				refetchTasks();
 				handleCloseEditModal();
 			} else {
-				alert("Failed to update task");
+				alert(t("errors.generic"));
 			}
 		} catch (error) {
-			alert("Error updating task");
+			alert(t("errors.generic"));
 		}
 	};
 
@@ -327,10 +329,10 @@ export default function ProjectTasksSection({ projectId }) {
 	return (
 		<div className="space-y-6">
 			<div className="flex items-center justify-between">
-				<h2 className="text-xl font-semibold text-gray-900">Project Tasks</h2>
+				<h2 className="text-xl font-semibold text-gray-900">{t("tasks.title")}</h2>
 				<div className="flex items-center gap-3">
 					<Badge variant="default" className="text-sm">
-						{projectTasks.length} {projectTasks.length === 1 ? "task" : "tasks"}
+						{projectTasks.length} {projectTasks.length === 1 ? t("tasks.task") : t("tasks.tasks")}
 					</Badge>
 					<Button
 						variant="primary"
@@ -350,7 +352,7 @@ export default function ProjectTasksSection({ projectId }) {
 								d="M12 4v16m8-8H4"
 							/>
 						</svg>
-						Add Task
+						{t("tasks.newTask")}
 					</Button>
 				</div>
 			</div>{" "}
@@ -404,7 +406,7 @@ export default function ProjectTasksSection({ projectId }) {
 			{/* Current Tasks */}
 			<Card>
 				<CardHeader>
-					<h3 className="text-lg font-medium text-gray-900">Current Tasks</h3>
+					<h3 className="text-lg font-medium text-gray-900">{t("tasks.title")}</h3>
 				</CardHeader>
 				<CardContent className="p-0">
 					{loading ? (
@@ -430,10 +432,10 @@ export default function ProjectTasksSection({ projectId }) {
 								</svg>
 							</div>
 							<p className="text-gray-500 text-sm">
-								No tasks assigned to this project yet.
+								{t("tasks.noTasksMessage")}
 							</p>
 							<p className="text-gray-400 text-xs mt-1">
-								Add a task above to get started.
+								{t("tasks.addTaskMessage")}
 							</p>
 						</div>
 					) : (
@@ -442,22 +444,22 @@ export default function ProjectTasksSection({ projectId }) {
 								<thead className="bg-gray-50 border-b border-gray-200">
 									<tr>
 										<th className="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
-											Task
+											{t("tasks.taskName")}
 										</th>
 										<th className="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
-											Priority
+											{t("tasks.priority")}
 										</th>{" "}
 										<th className="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
-											Max Wait
+											{t("tasks.maxWait")}
 										</th>
 										<th className="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
-											Date Started
+											{t("tasks.dateStarted")}
 										</th>
 										<th className="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
-											Status
+											{t("tasks.status")}
 										</th>
 										<th className="px-4 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider w-48">
-											Actions
+											{t("tasks.actions")}
 										</th>
 									</tr>
 								</thead>
@@ -503,16 +505,16 @@ export default function ProjectTasksSection({ projectId }) {
 														variant={getPriorityVariant(task.priority)}
 														size="sm"
 													>
-														{task.priority}
+														{t(`tasks.${task.priority}`)}
 													</Badge>
 												</td>
 												<td className="px-4 py-4 text-sm text-gray-600">
-													{task.max_wait_days} days
+													{task.max_wait_days} {t("tasks.days")}
 												</td>{" "}
 												<td className="px-4 py-4 text-sm text-gray-600">
 													{task.date_started
 														? formatDate(task.date_started)
-														: "Not started"}
+														: t("tasks.notStarted")}
 												</td>
 												<td className="px-4 py-4">
 													<TaskStatusDropdownSimple
@@ -564,7 +566,7 @@ export default function ProjectTasksSection({ projectId }) {
 																	d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z"
 																/>
 															</svg>
-															Edit
+															{t("common.edit")}
 														</Button>
 														<Button
 															variant="danger"
@@ -585,7 +587,7 @@ export default function ProjectTasksSection({ projectId }) {
 																	d="19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16"
 																/>
 															</svg>
-															Delete
+															{t("common.delete")}
 														</Button>
 													</div>
 												</td>
@@ -596,7 +598,7 @@ export default function ProjectTasksSection({ projectId }) {
 													<td colSpan="6" className="px-4 py-3">
 														<div className="text-sm text-gray-700">
 															<span className="font-medium text-gray-900">
-																Description:
+																{t("tasks.description")}:
 															</span>
 															<p className="mt-1">{task.description}</p>
 														</div>
@@ -609,7 +611,7 @@ export default function ProjectTasksSection({ projectId }) {
 													<td colSpan="6" className="px-4 py-4">
 														<div className="space-y-3">
 															<h5 className="text-sm font-medium text-gray-900">
-																Notes ({taskNotes[task.id]?.length || 0})
+																{t("tasks.comments")} ({taskNotes[task.id]?.length || 0})
 															</h5>
 
 															{/* Existing Notes */}
@@ -629,7 +631,7 @@ export default function ProjectTasksSection({ projectId }) {
 																					<div className="flex items-center gap-2 mb-1">
 																						{note.is_system ? (
 																							<span className="px-2 py-1 text-xs bg-blue-100 text-blue-700 rounded-full font-medium">
-																								System
+																								{t("admin.system")}
 																							</span>
 																						) : null}
 																						{note.created_by_name && (
@@ -670,7 +672,7 @@ export default function ProjectTasksSection({ projectId }) {
 															<div className="flex gap-2">
 																<input
 																	type="text"
-																	placeholder="Add a note..."
+																	placeholder={t("tasks.addComment")}
 																	value={newNote[task.id] || ""}
 																	onChange={(e) =>
 																		setNewNote((prev) => ({
@@ -694,7 +696,7 @@ export default function ProjectTasksSection({ projectId }) {
 																		!newNote[task.id]?.trim()
 																	}
 																>
-																	{loadingNotes[task.id] ? "Adding..." : "Add"}
+																	{loadingNotes[task.id] ? t("common.saving") : t("common.add")}
 																</Button>
 															</div>
 														</div>
@@ -715,7 +717,7 @@ export default function ProjectTasksSection({ projectId }) {
 					<div className="bg-white rounded-lg p-6 w-full max-w-md mx-4">
 						<div className="flex items-center justify-between mb-4">
 							<h3 className="text-lg font-semibold text-gray-900">
-								Edit Task:{" "}
+								{t("tasks.editTask")}:{" "}
 								{editingTask?.custom_task_name || editingTask?.task_name}
 							</h3>
 							<button
@@ -740,7 +742,7 @@ export default function ProjectTasksSection({ projectId }) {
 							{/* Assignment */}
 							<div>
 								<label className="block text-sm font-medium text-gray-700 mb-1">
-									Assigned To
+									{t("tasks.assignedTo")}
 								</label>
 								<select
 									value={editTaskForm.assigned_to}
@@ -752,7 +754,7 @@ export default function ProjectTasksSection({ projectId }) {
 									}
 									className="w-full px-3 py-2 border border-gray-300 rounded-md focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
 								>
-									<option value="">Unassigned</option>
+									<option value="">{t("projects.unassigned")}</option>
 									{users.map((user) => (
 										<option key={user.id} value={user.id}>
 											{user.name}
@@ -764,7 +766,7 @@ export default function ProjectTasksSection({ projectId }) {
 							{/* Priority */}
 							<div>
 								<label className="block text-sm font-medium text-gray-700 mb-1">
-									Priority
+									{t("tasks.priority")}
 								</label>
 								<select
 									value={editTaskForm.priority}
@@ -776,18 +778,18 @@ export default function ProjectTasksSection({ projectId }) {
 									}
 									className="w-full px-3 py-2 border border-gray-300 rounded-md focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
 								>
-									<option value="">Select Priority</option>
+									<option value="">{t("common.selectOption")}</option>
-									<option value="low">Low</option>
+									<option value="low">{t("tasks.low")}</option>
-									<option value="normal">Normal</option>
+									<option value="normal">{t("tasks.normal")}</option>
-									<option value="high">High</option>
+									<option value="high">{t("tasks.high")}</option>
-									<option value="urgent">Urgent</option>
+									<option value="urgent">{t("tasks.urgent")}</option>
 								</select>
 							</div>
 
 							{/* Date Started */}
 							<div>
 								<label className="block text-sm font-medium text-gray-700 mb-1">
-									Date Started
+									{t("tasks.dateStarted")}
 								</label>
 								<input
 									type="date"
@@ -805,7 +807,7 @@ export default function ProjectTasksSection({ projectId }) {
 							{/* Status */}
 							<div>
 								<label className="block text-sm font-medium text-gray-700 mb-1">
-									Status
+									{t("tasks.status")}
 								</label>
 								<select
 									value={editTaskForm.status}
@@ -817,21 +819,21 @@ export default function ProjectTasksSection({ projectId }) {
 									}
 									className="w-full px-3 py-2 border border-gray-300 rounded-md focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
 								>
-									<option value="">Select Status</option>
+									<option value="">{t("common.selectOption")}</option>
-									<option value="pending">Pending</option>
+									<option value="pending">{t("taskStatus.pending")}</option>
-									<option value="in_progress">In Progress</option>
+									<option value="in_progress">{t("taskStatus.in_progress")}</option>
-									<option value="completed">Completed</option>
+									<option value="completed">{t("taskStatus.completed")}</option>
-									<option value="cancelled">Cancelled</option>
+									<option value="cancelled">{t("taskStatus.cancelled")}</option>
 								</select>
 							</div>
 						</div>
 
 						<div className="flex items-center justify-end gap-3 mt-6">
 							<Button variant="outline" onClick={handleCloseEditModal}>
-								Cancel
+								{t("common.cancel")}
 							</Button>
 							<Button variant="primary" onClick={handleUpdateTask}>
-								Update Task
+								{t("tasks.updateTask")}
 							</Button>
 						</div>
 					</div>

src/components/TaskStatusDropdownSimple.js

@@ -3,13 +3,16 @@
 import { useState, useRef, useEffect } from "react";
 import { createPortal } from "react-dom";
 import Badge from "@/components/ui/Badge";
+import { useTranslation } from "@/lib/i18n";
 
 export default function TaskStatusDropdown({
 	task,
 	size = "sm",
 	showDropdown = true,
 	onStatusChange,
-}) {	const [status, setStatus] = useState(task.status);
+}) {	
+	const { t } = useTranslation();
+	const [status, setStatus] = useState(task.status);
 	const [loading, setLoading] = useState(false);
 	const [isOpen, setIsOpen] = useState(false);
 	const [dropdownPosition, setDropdownPosition] = useState({ x: 0, y: 0, position: 'bottom' });
@@ -23,19 +26,19 @@ export default function TaskStatusDropdown({
 
 	const statusConfig = {
 		pending: {
-			label: "Pending",
+			label: t("taskStatus.pending"),
 			variant: "warning",
 		},
 		in_progress: {
-			label: "In Progress",
+			label: t("taskStatus.in_progress"),
 			variant: "primary",
 		},
 		completed: {
-			label: "Completed",
+			label: t("taskStatus.completed"),
 			variant: "success",
 		},
 		cancelled: {
-			label: "Cancelled",
+			label: t("taskStatus.cancelled"),
 			variant: "danger",
 		},
 	};

src/components/ui/LanguageSwitcher.js

@@ -0,0 +1,42 @@
+"use client";
+
+import { useTranslation } from '@/lib/i18n';
+
+const LanguageSwitcher = ({ className = '' }) => {
+  const { language, changeLanguage, availableLanguages, t } = useTranslation();
+
+  const languageNames = {
+    pl: 'Polski',
+    en: 'English'
+  };
+
+  return (
+    <div className={`relative ${className}`}>
+      <select
+        value={language}
+        onChange={(e) => changeLanguage(e.target.value)}
+        className="appearance-none bg-white border border-gray-300 rounded-md px-3 py-1 pr-8 text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
+        title={t('common.selectLanguage')}
+      >
+        {availableLanguages.map((lang) => (
+          <option key={lang} value={lang}>
+            {languageNames[lang] || lang.toUpperCase()}
+          </option>
+        ))}
+      </select>
+      
+      {/* Custom dropdown arrow */}
+      <div className="pointer-events-none absolute inset-y-0 right-0 flex items-center px-2 text-gray-700">
+        <svg
+          className="fill-current h-4 w-4"
+          xmlns="http://www.w3.org/2000/svg"
+          viewBox="0 0 20 20"
+        >
+          <path d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z" />
+        </svg>
+      </div>
+    </div>
+  );
+};
+
+export default LanguageSwitcher;

src/components/ui/Navigation.js

@@ -3,10 +3,13 @@
 import Link from "next/link";
 import { usePathname } from "next/navigation";
 import { useSession, signOut } from "next-auth/react";
+import { useTranslation } from "@/lib/i18n";
+import LanguageSwitcher from "./LanguageSwitcher";
 
 const Navigation = () => {
 	const pathname = usePathname();
 	const { data: session, status } = useSession();
+	const { t } = useTranslation();
 
 	const isActive = (path) => {
 		if (path === "/") return pathname === "/";
@@ -18,16 +21,16 @@ const Navigation = () => {
 	};
 
 	const navItems = [
-		{ href: "/", label: "Dashboard" },
+		{ href: "/", label: t('navigation.dashboard') },
-		{ href: "/projects", label: "Projects" },
+		{ href: "/projects", label: t('navigation.projects') },
-		{ href: "/tasks/templates", label: "Task Templates" },
+		{ href: "/tasks/templates", label: t('navigation.taskTemplates') },
-		{ href: "/project-tasks", label: "Project Tasks" },
+		{ href: "/project-tasks", label: t('navigation.projectTasks') },
-		{ href: "/contracts", label: "Contracts" },
+		{ href: "/contracts", label: t('navigation.contracts') },
 	];
 
 	// Add admin-only items
 	if (session?.user?.role === 'admin') {
-		navItems.push({ href: "/admin/users", label: "User Management" });
+		navItems.push({ href: "/admin/users", label: t('navigation.userManagement') });
 	}
 
 	const handleSignOut = async () => {
@@ -45,13 +48,13 @@ const Navigation = () => {
 				<div className="flex items-center justify-between h-16">
 					<div className="flex items-center">
 						<Link href="/" className="text-xl font-bold text-gray-900">
-							Project Panel
+							{t('navigation.projectPanel')}
 						</Link>
 					</div>
 
 					<div className="flex items-center space-x-4">
 						{status === "loading" ? (
-							<div className="text-gray-500">Loading...</div>
+							<div className="text-gray-500">{t('navigation.loading')}</div>
 						) : session ? (
 							<>
 								<div className="flex space-x-8">
@@ -71,10 +74,12 @@ const Navigation = () => {
 								</div>
 								
 								<div className="flex items-center space-x-4 ml-8 pl-8 border-l border-gray-200">
+									<LanguageSwitcher />
+									
 									<div className="flex items-center space-x-2">
 										<div className="text-sm">
 											<div className="font-medium text-gray-900">{session.user.name}</div>
-											<div className="text-gray-500 capitalize">{session.user.role?.replace('_', ' ')}</div>
+											<div className="text-gray-500 capitalize">{t(`userRoles.${session.user.role}`) || session.user.role?.replace('_', ' ')}</div>
 										</div>
 									</div>
 									
@@ -82,17 +87,20 @@ const Navigation = () => {
 										onClick={handleSignOut}
 										className="bg-gray-100 hover:bg-gray-200 text-gray-700 px-3 py-2 rounded-md text-sm font-medium transition-colors"
 									>
-										Sign Out
+										{t('navigation.signOut')}
 									</button>
 								</div>
 							</>
 						) : (
-							<Link
+							<>
-								href="/auth/signin"
+								<LanguageSwitcher />
-								className="bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded-md text-sm font-medium transition-colors"
+								<Link
-							>
+									href="/auth/signin"
-								Sign In
+									className="bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded-md text-sm font-medium transition-colors"
-							</Link>
+								>
+									{t('navigation.signIn')}
+								</Link>
+							</>
 						)}
 					</div>
 				</div>

src/lib/i18n.js

@@ -0,0 +1,859 @@
+"use client";
+
+import { createContext, useContext, useState, useEffect } from 'react';
+
+// Translation context
+const TranslationContext = createContext();
+
+// Translation data
+const translations = {
+  pl: {
+    // Navigation
+    navigation: {
+      dashboard: "Panel główny",
+      projects: "Projekty", 
+      taskTemplates: "Szablony zadań",
+      projectTasks: "Zadania projektów",
+      contracts: "Umowy",
+      userManagement: "Zarządzanie użytkownikami",
+      projectPanel: "Panel Projektów",
+      loading: "Ładowanie...",
+      signOut: "Wyloguj się",
+      signIn: "Zaloguj się"
+    },
+    
+    // Common UI elements
+    common: {
+      save: "Zapisz",
+      cancel: "Anuluj",
+      delete: "Usuń",
+      edit: "Edytuj",
+      add: "Dodaj",
+      create: "Utwórz",
+      update: "Aktualizuj",
+      search: "Szukaj",
+      filter: "Filtruj",
+      loading: "Ładowanie...",
+      saving: "Zapisywanie...",
+      creating: "Tworzenie...",
+      updating: "Aktualizowanie...",
+      yes: "Tak",
+      no: "Nie",
+      confirm: "Potwierdź",
+      close: "Zamknij",
+      back: "Wstecz",
+      next: "Dalej",
+      previous: "Poprzedni",
+      page: "Strona",
+      of: "z",
+      items: "pozycji",
+      all: "Wszystkie",
+      none: "Brak",
+      required: "wymagane",
+      optional: "opcjonalne",
+      selectOption: "Wybierz opcję",
+      selectLanguage: "Wybierz język",
+      noResults: "Brak wyników",
+      error: "Błąd",
+      success: "Sukces",
+      warning: "Ostrzeżenie",
+      info: "Informacja",
+      deleteConfirm: "Czy na pewno chcesz to usunąć?",
+      addNote: "Dodaj notatkę",
+      addNoteSuccess: "Notatka została dodana",
+      addNoteError: "Nie udało się zapisać notatki",
+      addNotePlaceholder: "Dodaj nową notatkę..."
+    },
+
+    // Dashboard
+    dashboard: {
+      title: "Panel główny",
+      subtitle: "Przegląd twoich projektów i zadań",
+      totalProjects: "Wszystkie projekty",
+      activeProjects: "Aktywne projekty", 
+      completedProjects: "Ukończone projekty",
+      overdueProjects: "Przeterminowane projekty",
+      totalContracts: "Wszystkie umowy",
+      activeContracts: "Aktywne umowy",
+      pendingTasks: "Oczekujące zadania",
+      inProgressTasks: "Zadania w trakcie",
+      completedTasks: "Ukończone zadania",
+      overdueTasks: "Przeterminowane zadania",
+      recentProjects: "Najnowsze projekty",
+      recentTasks: "Najnowsze zadania",
+      upcomingDeadlines: "Nadchodzące terminy",
+      projectsThisWeek: "Projekty w tym tygodniu",
+      tasksThisWeek: "Zadania w tym tygodniu",
+      completionRate: "Wskaźnik ukończenia",
+      viewAll: "Zobacz wszystkie",
+      noRecentProjects: "Brak najnowszych projektów",
+      noRecentTasks: "Brak najnowszych zadań",
+      noUpcomingDeadlines: "Brak nadchodzących terminów"
+    },
+
+    // Project statuses
+    projectStatus: {
+      registered: "Zarejestrowany",
+      in_progress_design: "W realizacji (projektowanie)",
+      in_progress_construction: "W realizacji (realizacja)",
+      fulfilled: "Zakończony",
+      unknown: "Nieznany"
+    },
+
+    // Project types
+    projectType: {
+      design: "Projektowanie",
+      construction: "Realizacja", 
+      "design+construction": "Projektowanie + Realizacja"
+    },
+
+    // Task statuses
+    taskStatus: {
+      pending: "Oczekujące",
+      in_progress: "W trakcie",
+      completed: "Ukończone",
+      cancelled: "Anulowane",
+      on_hold: "Wstrzymane"
+    },
+
+    // Projects
+    projects: {
+      title: "Projekty",
+      subtitle: "Zarządzaj swoimi projektami",
+      newProject: "Nowy projekt",
+      editProject: "Edytuj projekt",
+      deleteProject: "Usuń projekt",
+      projectName: "Nazwa projektu",
+      city: "Miasto",
+      address: "Adres",
+      plot: "Działka",
+      district: "Dzielnica",
+      unit: "Jednostka",
+      finishDate: "Data zakończenia",
+      contact: "Kontakt",
+      coordinates: "Współrzędne",
+      notes: "Notatki",
+      assignedTo: "Przypisane do",
+      unassigned: "Nieprzypisane",
+      createdBy: "Utworzone przez",
+      lastModified: "Ostatnia modyfikacja",
+      basicInformation: "Informacje podstawowe",
+      locationDetails: "Szczegóły lokalizacji",
+      projectDetails: "Szczegóły projektu",
+      additionalInfo: "Dodatkowe informacje",
+      searchPlaceholder: "Szukaj projektów po nazwie, mieście lub adresie...",
+      noProjects: "Brak projektów",
+      noProjectsMessage: "Rozpocznij od utworzenia swojego pierwszego projektu.",
+      deleteConfirm: "Czy na pewno chcesz usunąć ten projekt?",
+      deleteSuccess: "Projekt został pomyślnie usunięty",
+      createSuccess: "Projekt został pomyślnie utworzony", 
+      updateSuccess: "Projekt został pomyślnie zaktualizowany",
+      enterProjectName: "Wprowadź nazwę projektu",
+      enterCity: "Wprowadź miasto",
+      enterAddress: "Wprowadź adres",
+      enterPlotNumber: "Wprowadź numer działki",
+      enterDistrict: "Wprowadź dzielnicę",
+      enterUnit: "Wprowadź jednostkę",
+      enterContactDetails: "Wprowadź dane kontaktowe",
+      coordinatesPlaceholder: "np. 49.622958,20.629562",
+      enterNotes: "Wprowadź notatki..."
+    },
+
+    // Contracts
+    contracts: {
+      title: "Umowy",
+      subtitle: "Zarządzaj swoimi umowami i kontraktami",
+      newContract: "Nowa umowa",
+      editContract: "Edytuj umowę",
+      deleteContract: "Usuń umowę",
+      contractNumber: "Numer umowy",
+      contractName: "Nazwa umowy",
+      customerContractNumber: "Numer umowy klienta",
+      customer: "Klient",
+      investor: "Inwestor",
+      dateSigned: "Data zawarcia",
+      finishDate: "Data zakończenia",
+      searchPlaceholder: "Szukaj umów po numerze, nazwie, kliencie lub inwestorze...",
+      noContracts: "Brak umów",
+      noContractsMessage: "Rozpocznij od utworzenia swojej pierwszej umowy.",
+      noMatchingContracts: "Brak pasujących umów", 
+      changeSearchCriteria: "Spróbuj zmienić kryteria wyszukiwania lub filtry.",
+      all: "Wszystkie",
+      active: "Aktywne", 
+      withoutEndDate: "W trakcie",
+      expired: "Przeterminowane",
+      createContract: "Utwórz umowę",
+      enterContractNumber: "Wprowadź numer umowy",
+      enterContractName: "Wprowadź nazwę umowy",
+      enterCustomerContractNumber: "Wprowadź numer umowy klienta",
+      enterCustomerName: "Wprowadź nazwę klienta",
+      enterInvestorName: "Wprowadź nazwę inwestora",
+      signedOn: "Zawarcie:",
+      finishOn: "Zakończenie:",
+      customerLabel: "Zleceniodawca:",
+      investorLabel: "Inwestor:"
+    },
+
+    // Tasks
+    tasks: {
+      title: "Zadania",
+      task: "zadanie",
+      tasks: "zadania",
+      subtitle: "Zarządzaj zadaniami projektów",
+      newTask: "Nowe zadanie",
+      editTask: "Edytuj zadanie",
+      deleteTask: "Usuń zadanie",
+      taskName: "Nazwa zadania",
+      description: "Opis",
+      priority: "Priorytet",
+      assignedTo: "Przypisane do",
+      dueDate: "Termin wykonania",
+      status: "Status",
+      project: "Projekt",
+      template: "Szablon",
+      searchPlaceholder: "Szukaj zadań...",
+      noTasks: "Brak zadań",
+      noTasksMessage: "Brak zadań przypisanych do tego projektu.",
+      addTaskMessage: "Dodaj zadanie powyżej, aby rozpocząć.",
+      filterBy: "Filtruj według",
+      sortBy: "Sortuj według",
+      allTasks: "Wszystkie zadania",
+      myTasks: "Moje zadania",
+      overdue: "Przeterminowane",
+      dueSoon: "Niedługo termin",
+      high: "Wysoki",
+      normal: "Normalny",
+      medium: "Średni",
+      low: "Niski",
+      dateCreated: "Data utworzenia",
+      dateModified: "Data modyfikacji",
+      daysLeft: "dni pozostało",
+      daysOverdue: "dni przeterminowane",
+      dueToday: "Termin dzisiaj",
+      startTask: "Rozpocznij zadanie",
+      completeTask: "Zakończ zadanie",
+      comments: "Komentarze",
+      addComment: "Dodaj komentarz",
+      noComments: "Brak komentarzy",
+      maxWait: "Maksymalne oczekiwanie",
+      dateStarted: "Data rozpoczęcia",
+      actions: "Działania",
+      urgent: "Pilne",
+      updateTask: "Aktualizuj zadanie",
+      notStarted: "Nie rozpoczęte",
+      days: "dni"
+    },
+
+    // Task Templates
+    taskTemplates: {
+      title: "Szablony zadań",
+      subtitle: "Zarządzaj szablonami zadań",
+      newTemplate: "Nowy szablon",
+      editTemplate: "Edytuj szablon",
+      deleteTemplate: "Usuń szablon",
+      templateName: "Nazwa szablonu",
+      templateDescription: "Opis szablonu",
+      defaultPriority: "Domyślny priorytet",
+      estimatedDuration: "Szacowany czas trwania",
+      category: "Kategoria",
+      searchPlaceholder: "Szukaj szablonów...",
+      noTemplates: "Brak szablonów",
+      noTemplatesMessage: "Rozpocznij od utworzenia swojego pierwszego szablonu zadania.",
+      useTemplate: "Użyj szablonu",
+      duplicateTemplate: "Duplikuj szablon"
+    },
+
+    // Forms
+    forms: {
+      validation: {
+        required: "To pole jest wymagane",
+        email: "Wprowadź prawidłowy adres email",
+        minLength: "Minimalna długość: {min} znaków",
+        maxLength: "Maksymalna długość: {max} znaków",
+        invalidDate: "Nieprawidłowa data",
+        invalidCoordinates: "Nieprawidłowe współrzędne"
+      },
+      placeholders: {
+        enterText: "Wprowadź tekst...",
+        selectDate: "Wybierz datę",
+        selectOption: "Wybierz opcję",
+        searchResults: "Szukaj wyników..."
+      }
+    },
+
+    // Sorting and filtering
+    sorting: {
+      sortBy: "Sortuj według",
+      orderBy: "Kolejność", 
+      ascending: "Rosnąco",
+      descending: "Malejąco",
+      name: "Nazwa",
+      date: "Data",
+      status: "Status",
+      priority: "Priorytet",
+      dateCreated: "Data utworzenia",
+      dateModified: "Data modyfikacji",
+      startDate: "Data rozpoczęcia",
+      finishDate: "Data zakończenia"
+    },
+
+    // Date formats
+    dates: {
+      today: "Dzisiaj",
+      yesterday: "Wczoraj", 
+      tomorrow: "Jutro",
+      daysAgo: "{count} dni temu",
+      inDays: "za {count} dni",
+      invalidDate: "Nieprawidłowa data",
+      selectDate: "Wybierz datę"
+    },
+
+    // Map layers
+    mapLayers: {
+      polishOrthophoto: "🛰️ Polska Ortofotomapa",
+      polishCadastral: "📋 Polskie Dane Katastralne",
+      polishSpatialPlanning: "🏗️ Polskie Planowanie Przestrzenne", 
+      lpPortalRoads: "🛣️ LP-Portal Drogi",
+      lpPortalStreetNames: "🏷️ LP-Portal Nazwy Ulic",
+      lpPortalParcels: "📐 LP-Portal Działki",
+      lpPortalSurveyMarkers: "📍 LP-Portal Punkty Pomiarowe",
+      openStreetMap: "🗺️ OpenStreetMap",
+      googleSatellite: "🛰️ Google Satelita",
+      googleRoads: "🛣️ Google Drogi",
+      layerControl: "Kontrola warstw",
+      baseLayers: "Warstwy bazowe",
+      overlayLayers: "Warstwy nakładkowe",
+      opacity: "Przezroczystość"
+    },
+
+    // Authentication
+    auth: {
+      signIn: "Zaloguj się",
+      signOut: "Wyloguj się",
+      email: "Email",
+      password: "Hasło",
+      rememberMe: "Zapamiętaj mnie",
+      forgotPassword: "Zapomniałeś hasła?",
+      signInWith: "Zaloguj się przez",
+      signUp: "Zarejestruj się",
+      createAccount: "Utwórz konto",
+      alreadyHaveAccount: "Masz już konto?",
+      dontHaveAccount: "Nie masz konta?",
+      signInError: "Błąd logowania",
+      signOutError: "Błąd wylogowania",
+      emailRequired: "Email jest wymagany",
+      passwordRequired: "Hasło jest wymagane",
+      invalidCredentials: "Nieprawidłowe dane logowania"
+    },
+
+    // User roles
+    userRoles: {
+      admin: "Administrator",
+      user: "Użytkownik",
+      manager: "Menedżer",
+      viewer: "Czytelnik"
+    },
+
+    // Error messages
+    errors: {
+      generic: "Wystąpił błąd. Spróbuj ponownie.",
+      network: "Błąd połączenia sieciowego",
+      unauthorized: "Brak autoryzacji",
+      forbidden: "Brak uprawnień",
+      notFound: "Nie znaleziono",
+      validation: "Błąd walidacji danych",
+      server: "Błąd serwera",
+      timeout: "Przekroczono limit czasu",
+      unknown: "Nieznany błąd"
+    },
+
+    // Success messages
+    success: {
+      saved: "Zapisano pomyślnie",
+      created: "Utworzono pomyślnie", 
+      updated: "Zaktualizowano pomyślnie",
+      deleted: "Usunięto pomyślnie",
+      sent: "Wysłano pomyślnie",
+      completed: "Ukończono pomyślnie"
+    },
+
+    // Admin section
+    admin: {
+      title: "Administracja",
+      subtitle: "Zarządzaj użytkownikami systemu i uprawnieniami",
+      userManagement: "Zarządzanie użytkownikami",
+      auditLogs: "Logi audytu",
+      systemSettings: "Ustawienia systemu",
+      users: "Użytkownicy",
+      newUser: "Nowy użytkownik",
+      editUser: "Edytuj użytkownika",
+      deleteUser: "Usuń użytkownika",
+      userName: "Nazwa użytkownika",
+      userEmail: "Email użytkownika",
+      userRole: "Rola użytkownika",
+      active: "Aktywny",
+      inactive: "Nieaktywny",
+      lastLogin: "Ostatnie logowanie",
+      createdAt: "Data utworzenia",
+      noUsers: "Brak użytkowników",
+      system: "System"
+    }
+  },
+  
+  en: {
+    // English translations (fallback)
+    navigation: {
+      dashboard: "Dashboard",
+      projects: "Projects",
+      taskTemplates: "Task Templates", 
+      projectTasks: "Project Tasks",
+      contracts: "Contracts",
+      userManagement: "User Management",
+      projectPanel: "Project Panel",
+      loading: "Loading...",
+      signOut: "Sign Out",
+      signIn: "Sign In"
+    },
+    
+    common: {
+      save: "Save",
+      cancel: "Cancel",
+      delete: "Delete",
+      edit: "Edit",
+      add: "Add",
+      create: "Create",
+      update: "Update",
+      search: "Search",
+      filter: "Filter",
+      loading: "Loading...",
+      saving: "Saving...",
+      creating: "Creating...",
+      updating: "Updating...",
+      yes: "Yes",
+      no: "No", 
+      confirm: "Confirm",
+      close: "Close",
+      back: "Back",
+      next: "Next",
+      previous: "Previous",
+      page: "Page",
+      of: "of",
+      items: "items",
+      all: "All",
+      none: "None",
+      required: "required",
+      optional: "optional",
+      selectOption: "Select option",
+      selectLanguage: "Select language",
+      noResults: "No results",
+      error: "Error",
+      success: "Success",
+      warning: "Warning",
+      info: "Info",
+      deleteConfirm: "Are you sure you want to delete this?",
+      addNote: "Add Note",
+      addNoteSuccess: "Note added",
+      addNoteError: "Failed to save note",
+      addNotePlaceholder: "Add a new note..."
+    },
+
+    dashboard: {
+      title: "Dashboard",
+      subtitle: "Overview of your projects and tasks",
+      totalProjects: "Total Projects",
+      activeProjects: "Active Projects",
+      completedProjects: "Completed Projects", 
+      overdueProjects: "Overdue Projects",
+      totalContracts: "Total Contracts",
+      activeContracts: "Active Contracts",
+      pendingTasks: "Pending Tasks",
+      inProgressTasks: "In Progress Tasks",
+      completedTasks: "Completed Tasks",
+      overdueTasks: "Overdue Tasks",
+      recentProjects: "Recent Projects",
+      recentTasks: "Recent Tasks",
+      upcomingDeadlines: "Upcoming Deadlines",
+      projectsThisWeek: "Projects This Week",
+      tasksThisWeek: "Tasks This Week",
+      completionRate: "Completion Rate",
+      viewAll: "View All",
+      noRecentProjects: "No recent projects",
+      noRecentTasks: "No recent tasks",
+      noUpcomingDeadlines: "No upcoming deadlines"
+    },
+
+    projectStatus: {
+      registered: "Registered",
+      in_progress_design: "In Progress (Design)",
+      in_progress_construction: "In Progress (Construction)",
+      fulfilled: "Completed",
+      unknown: "Unknown"
+    },
+
+    projectType: {
+      design: "Design",
+      construction: "Construction",
+      "design+construction": "Design + Construction"
+    },
+
+    taskStatus: {
+      pending: "Pending",
+      in_progress: "In Progress",
+      completed: "Completed",
+      cancelled: "Cancelled",
+      on_hold: "On Hold"
+    },
+
+    projects: {
+      title: "Projects",
+      subtitle: "Manage your projects",
+      newProject: "New Project",
+      editProject: "Edit Project",
+      deleteProject: "Delete Project",
+      projectName: "Project Name",
+      city: "City",
+      address: "Address",
+      plot: "Plot",
+      district: "District",
+      unit: "Unit",
+      finishDate: "Finish Date",
+      contact: "Contact",
+      coordinates: "Coordinates",
+      notes: "Notes",
+      assignedTo: "Assigned To",
+      unassigned: "Unassigned",
+      createdBy: "Created By",
+      lastModified: "Last Modified",
+      basicInformation: "Basic Information",
+      locationDetails: "Location Details",
+      projectDetails: "Project Details",
+      additionalInfo: "Additional Information",
+      searchPlaceholder: "Search projects by name, city or address...",
+      noProjects: "No projects",
+      noProjectsMessage: "Get started by creating your first project.",
+      deleteConfirm: "Are you sure you want to delete this project?",
+      deleteSuccess: "Project deleted successfully",
+      createSuccess: "Project created successfully",
+      updateSuccess: "Project updated successfully",
+      enterProjectName: "Enter project name",
+      enterCity: "Enter city",
+      enterAddress: "Enter address",
+      enterPlotNumber: "Enter plot number",
+      enterDistrict: "Enter district",
+      enterUnit: "Enter unit",
+      enterContactDetails: "Enter contact details",
+      coordinatesPlaceholder: "e.g., 49.622958,20.629562",
+      enterNotes: "Enter notes..."
+    },
+
+    contracts: {
+      title: "Contracts",
+      subtitle: "Manage your contracts and agreements",
+      newContract: "New Contract",
+      editContract: "Edit Contract",
+      deleteContract: "Delete Contract",
+      contractNumber: "Contract Number",
+      contractName: "Contract Name",
+      customerContractNumber: "Customer Contract Number",
+      customer: "Customer",
+      investor: "Investor",
+      dateSigned: "Date Signed",
+      finishDate: "Finish Date",
+      searchPlaceholder: "Search contracts by number, name, customer or investor...",
+      noContracts: "No contracts",
+      noContractsMessage: "Get started by creating your first contract.",
+      noMatchingContracts: "No matching contracts",
+      changeSearchCriteria: "Try changing your search criteria or filters.",
+      all: "All",
+      active: "Active",
+      withoutEndDate: "In Progress",
+      expired: "Expired",
+      createContract: "Create Contract",
+      enterContractNumber: "Enter contract number",
+      enterContractName: "Enter contract name",
+      enterCustomerContractNumber: "Enter customer contract number",
+      enterCustomerName: "Enter customer name",
+      enterInvestorName: "Enter investor name",
+      signedOn: "Signed:",
+      finishOn: "Finish:",
+      customerLabel: "Customer:",
+      investorLabel: "Investor:"
+    },
+
+    tasks: {
+      title: "Tasks",
+      task: "task",
+      tasks: "tasks",
+      subtitle: "Manage project tasks",
+      newTask: "New Task",
+      editTask: "Edit Task",
+      deleteTask: "Delete Task",
+      taskName: "Task Name",
+      description: "Description",
+      priority: "Priority",
+      assignedTo: "Assigned To",
+      dueDate: "Due Date",
+      status: "Status",
+      project: "Project",
+      template: "Template",
+      searchPlaceholder: "Search tasks...",
+      noTasks: "No tasks",
+      noTasksMessage: "No tasks assigned to this project yet.",
+      addTaskMessage: "Add a task above to get started.",
+      filterBy: "Filter by",
+      sortBy: "Sort by",
+      allTasks: "All Tasks",
+      myTasks: "My Tasks",
+      overdue: "Overdue",
+      dueSoon: "Due Soon",
+      high: "High",
+      normal: "Normal", 
+      medium: "Medium",
+      low: "Low",
+      dateCreated: "Date Created",
+      dateModified: "Date Modified",
+      daysLeft: "days left",
+      daysOverdue: "days overdue",
+      dueToday: "Due Today",
+      startTask: "Start Task",
+      completeTask: "Complete Task",
+      comments: "Comments",
+      addComment: "Add Comment",
+      noComments: "No comments",
+      maxWait: "Max Wait",
+      dateStarted: "Date Started",
+      actions: "Actions",
+      urgent: "Urgent",
+      updateTask: "Update Task",
+      notStarted: "Not started",
+      days: "days"
+    },
+
+    taskTemplates: {
+      title: "Task Templates",
+      subtitle: "Manage task templates",
+      newTemplate: "New Template",
+      editTemplate: "Edit Template",
+      deleteTemplate: "Delete Template",
+      templateName: "Template Name",
+      templateDescription: "Template Description",
+      defaultPriority: "Default Priority",
+      estimatedDuration: "Estimated Duration",
+      category: "Category",
+      searchPlaceholder: "Search templates...",
+      noTemplates: "No templates",
+      noTemplatesMessage: "Get started by creating your first task template.",
+      useTemplate: "Use Template",
+      duplicateTemplate: "Duplicate Template"
+    },
+
+    forms: {
+      validation: {
+        required: "This field is required",
+        email: "Please enter a valid email address",
+        minLength: "Minimum length: {min} characters",
+        maxLength: "Maximum length: {max} characters",
+        invalidDate: "Invalid date",
+        invalidCoordinates: "Invalid coordinates"
+      },
+      placeholders: {
+        enterText: "Enter text...",
+        selectDate: "Select date",
+        selectOption: "Select option",
+        searchResults: "Search results..."
+      }
+    },
+
+    sorting: {
+      sortBy: "Sort by",
+      orderBy: "Order by",
+      ascending: "Ascending",
+      descending: "Descending",
+      name: "Name",
+      date: "Date",
+      status: "Status",
+      priority: "Priority",
+      dateCreated: "Date Created",
+      dateModified: "Date Modified",
+      startDate: "Start Date",
+      finishDate: "Finish Date"
+    },
+
+    dates: {
+      today: "Today",
+      yesterday: "Yesterday",
+      tomorrow: "Tomorrow",
+      daysAgo: "{count} days ago",
+      inDays: "in {count} days",
+      invalidDate: "Invalid date",
+      selectDate: "Select date"
+    },
+
+    mapLayers: {
+      polishOrthophoto: "🛰️ Polish Orthophoto",
+      polishCadastral: "📋 Polish Cadastral Data",
+      polishSpatialPlanning: "🏗️ Polish Spatial Planning",
+      lpPortalRoads: "🛣️ LP-Portal Roads",
+      lpPortalStreetNames: "🏷️ LP-Portal Street Names",
+      lpPortalParcels: "📐 LP-Portal Parcels",
+      lpPortalSurveyMarkers: "📍 LP-Portal Survey Markers",
+      openStreetMap: "🗺️ OpenStreetMap",
+      googleSatellite: "🛰️ Google Satellite",
+      googleRoads: "🛣️ Google Roads",
+      layerControl: "Layer Control",
+      baseLayers: "Base Layers",
+      overlayLayers: "Overlay Layers",
+      opacity: "Opacity"
+    },
+
+    auth: {
+      signIn: "Sign In",
+      signOut: "Sign Out",
+      email: "Email",
+      password: "Password",
+      rememberMe: "Remember Me",
+      forgotPassword: "Forgot Password?",
+      signInWith: "Sign in with",
+      signUp: "Sign Up",
+      createAccount: "Create Account",
+      alreadyHaveAccount: "Already have an account?",
+      dontHaveAccount: "Don't have an account?",
+      signInError: "Sign in error",
+      signOutError: "Sign out error",
+      emailRequired: "Email is required",
+      passwordRequired: "Password is required",
+      invalidCredentials: "Invalid credentials"
+    },
+
+    userRoles: {
+      admin: "Administrator",
+      user: "User", 
+      manager: "Manager",
+      viewer: "Viewer"
+    },
+
+    errors: {
+      generic: "An error occurred. Please try again.",
+      network: "Network connection error",
+      unauthorized: "Unauthorized",
+      forbidden: "Forbidden",
+      notFound: "Not found",
+      validation: "Validation error",
+      server: "Server error",
+      timeout: "Request timeout",
+      unknown: "Unknown error"
+    },
+
+    success: {
+      saved: "Saved successfully",
+      created: "Created successfully",
+      updated: "Updated successfully",
+      deleted: "Deleted successfully",
+      sent: "Sent successfully",
+      completed: "Completed successfully"
+    },
+
+    admin: {
+      title: "Administration",
+      userManagement: "User Management",
+      auditLogs: "Audit Logs",
+      systemSettings: "System Settings",
+      users: "Users",
+      newUser: "New User",
+      editUser: "Edit User",
+      deleteUser: "Delete User",
+      userName: "User Name",
+      userEmail: "User Email",
+      userRole: "User Role",
+      active: "Active",
+      inactive: "Inactive",
+      lastLogin: "Last Login",
+      createdAt: "Created At",
+      noUsers: "No users",
+      system: "System"
+    }
+  }
+};
+
+// Translation provider component
+export function TranslationProvider({ children, initialLanguage = 'pl' }) {
+  const [language, setLanguage] = useState(initialLanguage);
+
+  // Load language from localStorage on mount
+  useEffect(() => {
+    const savedLanguage = localStorage.getItem('app-language');
+    if (savedLanguage && translations[savedLanguage]) {
+      setLanguage(savedLanguage);
+    }
+  }, []);
+
+  // Save language to localStorage when changed
+  useEffect(() => {
+    localStorage.setItem('app-language', language);
+  }, [language]);
+
+  const changeLanguage = (newLanguage) => {
+    if (translations[newLanguage]) {
+      setLanguage(newLanguage);
+    }
+  };
+
+  const t = (key, replacements = {}) => {
+    const keys = key.split('.');
+    let value = translations[language];
+    
+    for (const k of keys) {
+      if (value && typeof value === 'object' && k in value) {
+        value = value[k];
+      } else {
+        // Fallback to English if key not found in current language
+        value = translations.en;
+        for (const fallbackKey of keys) {
+          if (value && typeof value === 'object' && fallbackKey in value) {
+            value = value[fallbackKey];
+          } else {
+            console.warn(`Translation key not found: ${key} (language: ${language})`);
+            return key; // Return the key itself as fallback
+          }
+        }
+        break;
+      }
+    }
+
+    if (typeof value !== 'string') {
+      console.warn(`Translation value is not a string: ${key} (language: ${language})`);
+      return key;
+    }
+
+    // Replace placeholders like {count}, {min}, {max}, etc.
+    let result = value;
+    Object.keys(replacements).forEach(placeholder => {
+      result = result.replace(new RegExp(`{${placeholder}}`, 'g'), replacements[placeholder]);
+    });
+
+    return result;
+  };
+
+  return (
+    <TranslationContext.Provider value={{ 
+      t, 
+      language, 
+      changeLanguage, 
+      availableLanguages: Object.keys(translations) 
+    }}>
+      {children}
+    </TranslationContext.Provider>
+  );
+}
+
+// Hook to use translations
+export function useTranslation() {
+  const context = useContext(TranslationContext);
+  if (!context) {
+    throw new Error('useTranslation must be used within a TranslationProvider');
+  }
+  return context;
+}
+
+// Export translations for direct access if needed
+export { translations };

src/lib/utils.js

@@ -34,9 +34,9 @@ export const formatProjectType = (type) => {
 };
 
 export const getDeadlineText = (daysRemaining) => {
-	if (daysRemaining === 0) return "Due Today";
+	if (daysRemaining === 0) return "Termin dzisiaj";
-	if (daysRemaining > 0) return `${daysRemaining} days left`;
+	if (daysRemaining > 0) return `${daysRemaining} dni pozostało`;
-	return `${Math.abs(daysRemaining)} days overdue`;
+	return `${Math.abs(daysRemaining)} dni przeterminowane`;
 };
 
 export const formatDate = (date, options = {}) => {
@@ -46,7 +46,7 @@ export const formatDate = (date, options = {}) => {
 		const dateObj = typeof date === "string" ? new Date(date) : date;
 
 		if (isNaN(dateObj.getTime())) {
-			return "Invalid date";
+			return "Nieprawidłowa data";
 		}
 
 		// Default to DD.MM.YYYY format
@@ -63,7 +63,7 @@ export const formatDate = (date, options = {}) => {
 		return `${day}.${month}.${year}`;
 	} catch (error) {
 		console.error("Error formatting date:", error);
-		return "Invalid date";
+		return "Nieprawidłowa data";
 	}
 };