diff --git a/src/app/contracts/[id]/page.js b/src/app/contracts/[id]/page.js
index 58f33c5..b0977d0 100644
--- a/src/app/contracts/[id]/page.js
+++ b/src/app/contracts/[id]/page.js
@@ -12,6 +12,7 @@ import { LoadingState } from "@/components/ui/States";
 import { formatDate } from "@/lib/utils";
 import FileUploadModal from "@/components/FileUploadModal";
 import FileAttachmentsList from "@/components/FileAttachmentsList";
+import { useTranslation } from "@/lib/i18n";
 
 export default function ContractDetailsPage() {
 	const params = useParams();
@@ -21,6 +22,7 @@ export default function ContractDetailsPage() {
 	const [loading, setLoading] = useState(true);
 	const [showUploadModal, setShowUploadModal] = useState(false);
 	const [attachments, setAttachments] = useState([]);
+	const { t } = useTranslation();
 
 	useEffect(() => {
 		async function fetchContractDetails() {
@@ -67,7 +69,7 @@ export default function ContractDetailsPage() {
 	if (loading) {
 		return (
 			<PageContainer>
-				<LoadingState message="Loading contract details..." />
+				<LoadingState message={t('contracts.loadingContractDetails')} />
 			</PageContainer>
 		);
 	}
@@ -77,9 +79,9 @@ export default function ContractDetailsPage() {
 			<PageContainer>
 				<Card>
 					<CardContent className="text-center py-12">
-						<p className="text-red-600 text-lg mb-4">Contract not found.</p>
+						<p className="text-red-600 text-lg mb-4">{t('contracts.contractNotFound')}</p>
 						<Link href="/contracts">
-							<Button variant="primary">Back to Contracts</Button>
+							<Button variant="primary">{t('contracts.backToContracts')}</Button>
 						</Link>
 					</CardContent>
 				</Card>
@@ -89,8 +91,8 @@ export default function ContractDetailsPage() {
 	return (
 		<PageContainer>
 			<PageHeader
-				title={`Contract ${contract.contract_number}`}
-				description={contract.contract_name || "Contract Details"}
+				title={`${t('contracts.contract')} ${contract.contract_number}`}
+				description={contract.contract_name || t('contracts.contractInformation')}
 				action={
 					<div className="flex items-center gap-3">
 						<Link href="/contracts">
@@ -108,7 +110,7 @@ export default function ContractDetailsPage() {
 										d="M15 19l-7-7 7-7"
 									/>
 								</svg>
-								Back to Contracts
+								{t('contracts.backToContracts')}
 							</Button>
 						</Link>
 						<Link href={`/projects/new?contract_id=${contractId}`}>
@@ -126,7 +128,7 @@ export default function ContractDetailsPage() {
 										d="M12 4v16m8-8H4"
 									/>
 								</svg>
-								Add Project
+								{t('contracts.addProject')}
 							</Button>
 						</Link>
 					</div>
@@ -139,14 +141,14 @@ export default function ContractDetailsPage() {
 					<Card>
 						<CardHeader>
 							<h2 className="text-xl font-semibold text-gray-900">
-								Contract Information
+								{t('contracts.contractInformation')}
 							</h2>
 						</CardHeader>
 						<CardContent className="space-y-6">
 							<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
+										{t('contracts.contractNumber')}
 									</span>
 									<p className="text-gray-900 font-medium">
 										{contract.contract_number}
@@ -155,7 +157,7 @@ export default function ContractDetailsPage() {
 								{contract.contract_name && (
 									<div>
 										<span className="text-sm font-medium text-gray-500 block mb-1">
-											Contract Name
+											{t('contracts.contractName')}
 										</span>
 										<p className="text-gray-900 font-medium">
 											{contract.contract_name}
@@ -165,7 +167,7 @@ export default function ContractDetailsPage() {
 								{contract.customer_contract_number && (
 									<div>
 										<span className="text-sm font-medium text-gray-500 block mb-1">
-											Customer Contract Number
+											{t('contracts.customerContractNumber')}
 										</span>
 										<p className="text-gray-900 font-medium">
 											{contract.customer_contract_number}
@@ -175,7 +177,7 @@ export default function ContractDetailsPage() {
 								{contract.customer && (
 									<div>
 										<span className="text-sm font-medium text-gray-500 block mb-1">
-											Customer
+											{t('contracts.customer')}
 										</span>
 										<p className="text-gray-900 font-medium">
 											{contract.customer}
@@ -185,7 +187,7 @@ export default function ContractDetailsPage() {
 								{contract.investor && (
 									<div>
 										<span className="text-sm font-medium text-gray-500 block mb-1">
-											Investor
+											{t('contracts.investor')}
 										</span>
 										<p className="text-gray-900 font-medium">
 											{contract.investor}
@@ -195,7 +197,7 @@ export default function ContractDetailsPage() {
 								{contract.date_signed && (
 									<div>
 										<span className="text-sm font-medium text-gray-500 block mb-1">
-											Date Signed
+											{t('contracts.dateSigned')}
 										</span>
 										<p className="text-gray-900 font-medium">
 											{formatDate(contract.date_signed)}
@@ -205,7 +207,7 @@ export default function ContractDetailsPage() {
 								{contract.finish_date && (
 									<div>
 										<span className="text-sm font-medium text-gray-500 block mb-1">
-											Finish Date
+											{t('contracts.finishDate')}
 										</span>
 										<p className="text-gray-900 font-medium">
 											{formatDate(contract.finish_date)}
@@ -221,22 +223,22 @@ export default function ContractDetailsPage() {
 				<div>
 					<Card>
 						<CardHeader>
-							<h2 className="text-lg font-semibold text-gray-900">Summary</h2>
+							<h2 className="text-lg font-semibold text-gray-900">{t('contracts.summary')}</h2>
 						</CardHeader>
 						<CardContent className="space-y-4">
 							<div>
 								<span className="text-sm font-medium text-gray-500 block mb-2">
-									Projects Count
+									{t('contracts.projectsCount')}
 								</span>
 								<Badge variant="primary" size="lg">
-									{projects.length} Projects
+									{projects.length} {t('contracts.projects')}
 								</Badge>
 							</div>
 
 							{contract.finish_date && (
 								<div className="border-t pt-4">
 									<span className="text-sm font-medium text-gray-500 block mb-2">
-										Contract Status
+										{t('contracts.contractStatus')}
 									</span>
 									<Badge
 										variant={
@@ -247,8 +249,8 @@ export default function ContractDetailsPage() {
 										size="md"
 									>
 										{new Date(contract.finish_date) > new Date()
-											? "Active"
-											: "Expired"}
+											? t('contracts.active')
+											: t('contracts.expired')}
 									</Badge>
 								</div>
 							)}
@@ -262,7 +264,7 @@ export default function ContractDetailsPage() {
 				<CardHeader>
 					<div className="flex justify-between items-center">
 						<h2 className="text-xl font-semibold text-gray-900">
-							Contract Documents ({attachments.length})
+							{t('contracts.contractDocuments')} ({attachments.length})
 						</h2>
 						<Button
 							variant="primary"
@@ -282,7 +284,7 @@ export default function ContractDetailsPage() {
 									d="M7 16a4 4 0 01-.88-7.903A5 5 0 1115.9 6L16 6a5 5 0 011 9.9M15 13l-3-3m0 0l-3 3m3-3v12"
 								/>
 							</svg>
-							Upload Document
+							{t('contracts.uploadDocument')}
 						</Button>
 					</div>
 				</CardHeader>
@@ -300,7 +302,7 @@ export default function ContractDetailsPage() {
 				<CardHeader>
 					<div className="flex justify-between items-center">
 						<h2 className="text-xl font-semibold text-gray-900">
-							Associated Projects ({projects.length})
+							{t('contracts.associatedProjects')} ({projects.length})
 						</h2>
 						<Link href={`/projects/new?contract_id=${contractId}`}>
 							<Button variant="outline" size="sm">
@@ -317,7 +319,7 @@ export default function ContractDetailsPage() {
 										d="M12 4v16m8-8H4"
 									/>
 								</svg>
-								Add Project
+								{t('contracts.addProject')}
 							</Button>
 						</Link>
 					</div>
@@ -339,13 +341,13 @@ export default function ContractDetailsPage() {
 								</svg>
 							</div>
 							<h3 className="text-lg font-medium text-gray-900 mb-2">
-								No projects yet
+								{t('contracts.noProjectsYet')}
 							</h3>
 							<p className="text-gray-500 mb-6">
-								Get started by creating your first project for this contract
+								{t('contracts.getStartedMessage')}
 							</p>
 							<Link href={`/projects/new?contract_id=${contractId}`}>
-								<Button variant="primary">Create First Project</Button>
+								<Button variant="primary">{t('contracts.createFirstProject')}</Button>
 							</Link>
 						</div>
 					) : (
@@ -411,22 +413,22 @@ export default function ContractDetailsPage() {
 														size="sm"
 													>
 														{project.project_status === "registered"
-															? "Registered"
+															? t('projectStatus.registered')
 															: project.project_status === "in_progress_design"
-															? "In Progress (Design)"
+															? t('projectStatus.in_progress_design')
 															: project.project_status ===
 															  "in_progress_construction"
-															? "In Progress (Construction)"
+															? t('projectStatus.in_progress_construction')
 															: project.project_status === "fulfilled"
-															? "Completed"
-															: "Unknown"}
+															? t('projectStatus.fulfilled')
+															: t('projectStatus.unknown')}
 													</Badge>
 												</div>
 											</div>
 										</div>
 										<Link href={`/projects/${project.project_id}`}>
 											<Button variant="outline" size="sm">
-												View Details
+												{t('contracts.viewDetails')}
 											</Button>
 										</Link>
 									</div>
diff --git a/src/app/contracts/new/page.js b/src/app/contracts/new/page.js
index ffa0503..2240140 100644
--- a/src/app/contracts/new/page.js
+++ b/src/app/contracts/new/page.js
@@ -1,15 +1,19 @@
+"use client";
+
 import ContractForm from "@/components/ContractForm";
 import PageContainer from "@/components/ui/PageContainer";
 import PageHeader from "@/components/ui/PageHeader";
 import Button from "@/components/ui/Button";
 import Link from "next/link";
+import { useTranslation } from "@/lib/i18n";
 
 export default function NewContractPage() {
+	const { t } = useTranslation();
 	return (
 		<PageContainer>
 			<PageHeader
-				title="Create New Contract"
-				description="Add a new contract to your portfolio"
+				title={t('contracts.createNewContract')}
+				description={t('contracts.addNewContractDescription')}
 				action={
 					<Link href="/contracts">
 						<Button variant="outline" size="sm">
@@ -26,7 +30,7 @@ export default function NewContractPage() {
 									d="M15 19l-7-7 7-7"
 								/>
 							</svg>
-							Back to Contracts
+							{t('contracts.backToContracts')}
 						</Button>
 					</Link>
 				}
diff --git a/src/components/ContractForm.js b/src/components/ContractForm.js
index bf4eee6..c21cece 100644
--- a/src/components/ContractForm.js
+++ b/src/components/ContractForm.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 ContractForm() {
+	const { t } = useTranslation();
 	const [form, setForm] = useState({
 		contract_number: "",
 		contract_name: "",
@@ -42,13 +44,11 @@ export default function ContractForm() {
 				const contract = await res.json();
 				router.push(`/contracts/${contract.contract_id}`);
 			} else {
-				alert(
-					"Failed to create contract. Please check the data and try again."
-				);
+				alert(t('contracts.failedToCreateContract'));
 			}
 		} catch (error) {
 			console.error("Error creating contract:", error);
-			alert("Failed to create contract. Please try again.");
+			alert(t('contracts.failedToCreateContract'));
 		} finally {
 			setLoading(false);
 		}
@@ -58,7 +58,7 @@ export default function ContractForm() {
 		<Card>
 			<CardHeader>
 				<h2 className="text-xl font-semibold text-gray-900">
-					Contract Details
+					{t('contracts.contractDetails')}
 				</h2>
 			</CardHeader>
 			<CardContent>
@@ -67,73 +67,73 @@ export default function ContractForm() {
 					<div className="grid grid-cols-1 md:grid-cols-2 gap-6">
 						<div>
 							<label className="block text-sm font-medium text-gray-700 mb-2">
-								Contract Number <span className="text-red-500">*</span>
+								{t('contracts.contractNumber')} <span className="text-red-500">*</span>
 							</label>
 							<Input
 								type="text"
 								name="contract_number"
 								value={form.contract_number || ""}
 								onChange={handleChange}
-								placeholder="Enter contract number"
+								placeholder={t('contracts.enterContractNumber')}
 								required
 							/>
 						</div>
 
 						<div>
 							<label className="block text-sm font-medium text-gray-700 mb-2">
-								Contract Name
+								{t('contracts.contractName')}
 							</label>
 							<Input
 								type="text"
 								name="contract_name"
 								value={form.contract_name || ""}
 								onChange={handleChange}
-								placeholder="Enter contract name"
+								placeholder={t('contracts.enterContractName')}
 							/>
 						</div>
 
 						<div>
 							<label className="block text-sm font-medium text-gray-700 mb-2">
-								Customer Contract Number
+								{t('contracts.customerContractNumber')}
 							</label>
 							<Input
 								type="text"
 								name="customer_contract_number"
 								value={form.customer_contract_number || ""}
 								onChange={handleChange}
-								placeholder="Enter customer contract number"
+								placeholder={t('contracts.enterCustomerContractNumber')}
 							/>
 						</div>
 
 						<div>
 							<label className="block text-sm font-medium text-gray-700 mb-2">
-								Customer
+								{t('contracts.customer')}
 							</label>
 							<Input
 								type="text"
 								name="customer"
 								value={form.customer || ""}
 								onChange={handleChange}
-								placeholder="Enter customer name"
+								placeholder={t('contracts.enterCustomerName')}
 							/>
 						</div>
 
 						<div>
 							<label className="block text-sm font-medium text-gray-700 mb-2">
-								Investor
+								{t('contracts.investor')}
 							</label>
 							<Input
 								type="text"
 								name="investor"
 								value={form.investor || ""}
 								onChange={handleChange}
-								placeholder="Enter investor name"
+								placeholder={t('contracts.enterInvestorName')}
 							/>
 						</div>
 
 						<div>
 							<label className="block text-sm font-medium text-gray-700 mb-2">
-								Date Signed
+								{t('contracts.dateSigned')}
 							</label>{" "}
 							<Input
 								type="date"
@@ -145,7 +145,7 @@ export default function ContractForm() {
 
 						<div className="md:col-span-2">
 							<label className="block text-sm font-medium text-gray-700 mb-2">
-								Finish Date
+								{t('contracts.finishDate')}
 							</label>{" "}
 							<Input
 								type="date"
@@ -164,7 +164,7 @@ export default function ContractForm() {
 							onClick={() => router.back()}
 							disabled={loading}
 						>
-							Cancel
+							{t('common.cancel')}
 						</Button>
 						<Button type="submit" variant="primary" disabled={loading}>
 							{loading ? (
@@ -189,7 +189,7 @@ export default function ContractForm() {
 											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>
-									Creating...
+									{t('common.creating')}
 								</>
 							) : (
 								<>
@@ -206,7 +206,7 @@ export default function ContractForm() {
 											d="M12 4v16m8-8H4"
 										/>
 									</svg>
-									Create Contract
+									{t('contracts.createContract')}
 								</>
 							)}
 						</Button>
diff --git a/src/components/FileAttachmentsList.js b/src/components/FileAttachmentsList.js
index 46bfac9..eaf5177 100644
--- a/src/components/FileAttachmentsList.js
+++ b/src/components/FileAttachmentsList.js
@@ -3,10 +3,12 @@
 import { useState, useEffect } from "react";
 import Button from "@/components/ui/Button";
 import { formatDate } from "@/lib/utils";
+import { useTranslation } from "@/lib/i18n";
 
 export default function FileAttachmentsList({ entityType, entityId, onFilesChange }) {
 	const [files, setFiles] = useState([]);
 	const [loading, setLoading] = useState(true);
+	const { t } = useTranslation();
 
 	const fetchFiles = async () => {
 		try {
@@ -30,7 +32,7 @@ export default function FileAttachmentsList({ entityType, entityId, onFilesChang
 	}, [entityType, entityId]);
 
 	const handleDelete = async (fileId) => {
-		if (!confirm("Are you sure you want to delete this file?")) {
+		if (!confirm(t('contracts.confirmDeleteFile'))) {
 			return;
 		}
 
@@ -45,11 +47,11 @@ export default function FileAttachmentsList({ entityType, entityId, onFilesChang
 					onFilesChange(files.filter(file => file.file_id !== fileId));
 				}
 			} else {
-				alert("Failed to delete file");
+				alert(t('contracts.failedToDeleteFile'));
 			}
 		} catch (error) {
 			console.error("Error deleting file:", error);
-			alert("Failed to delete file");
+			alert(t('contracts.failedToDeleteFile'));
 		}
 	};
 
@@ -102,7 +104,7 @@ export default function FileAttachmentsList({ entityType, entityId, onFilesChang
 					<circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
 					<path className="opacity-75" fill="currentColor" 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" />
 				</svg>
-				<span className="ml-2 text-gray-500">Loading files...</span>
+				<span className="ml-2 text-gray-500">{t('contracts.loadingFiles')}</span>
 			</div>
 		);
 	}
@@ -113,7 +115,7 @@ export default function FileAttachmentsList({ entityType, entityId, onFilesChang
 				<svg className="w-12 h-12 text-gray-300 mx-auto mb-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
 					<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} 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>
-				<p className="text-gray-500">No documents uploaded yet</p>
+				<p className="text-gray-500">{t('contracts.noDocumentsUploaded')}</p>
 			</div>
 		);
 	}
@@ -156,7 +158,7 @@ export default function FileAttachmentsList({ entityType, entityId, onFilesChang
 								<svg className="w-4 h-4 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
 									<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 10v6m0 0l-3-3m3 3l3-3m2 8H7a2 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>
-								Download
+								{t('contracts.download')}
 							</Button>
 						</a>
 						<Button
diff --git a/src/components/FileUploadModal.js b/src/components/FileUploadModal.js
index 09fe3a9..296971f 100644
--- a/src/components/FileUploadModal.js
+++ b/src/components/FileUploadModal.js
@@ -2,6 +2,7 @@
 
 import { useState, useRef } from "react";
 import Button from "@/components/ui/Button";
+import { useTranslation } from "@/lib/i18n";
 
 export default function FileUploadModal({ 
 	isOpen, 
@@ -14,6 +15,7 @@ export default function FileUploadModal({
 	const [uploading, setUploading] = useState(false);
 	const [description, setDescription] = useState("");
 	const fileInputRef = useRef(null);
+	const { t } = useTranslation();
 
 	const handleDrag = (e) => {
 		e.preventDefault();
@@ -67,11 +69,11 @@ export default function FileUploadModal({
 				onClose();
 			} else {
 				const error = await response.json();
-				alert(error.error || "Failed to upload file");
+				alert(error.error || t('contracts.failedToUploadFile'));
 			}
 		} catch (error) {
 			console.error("Upload error:", error);
-			alert("Failed to upload file");
+			alert(t('contracts.failedToUploadFile'));
 		} finally {
 			setUploading(false);
 		}
@@ -88,7 +90,7 @@ export default function FileUploadModal({
 			<div className="bg-white rounded-lg p-6 w-full max-w-md mx-4">
 				<div className="flex items-center justify-between mb-6">
 					<h3 className="text-lg font-semibold text-gray-900">
-						Upload Document
+						{t('contracts.uploadDocumentTitle')}
 					</h3>
 					<button
 						onClick={onClose}
@@ -105,13 +107,13 @@ export default function FileUploadModal({
 					{/* Description Input */}
 					<div>
 						<label className="block text-sm font-medium text-gray-700 mb-2">
-							Description (optional)
+							{t('contracts.descriptionOptional')}
 						</label>
 						<input
 							type="text"
 							value={description}
 							onChange={(e) => setDescription(e.target.value)}
-							placeholder="Brief description of the document..."
+							placeholder={t('contracts.descriptionPlaceholder')}
 							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"
 							disabled={uploading}
 						/>
@@ -144,7 +146,7 @@ export default function FileUploadModal({
 									<circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
 									<path className="opacity-75" fill="currentColor" 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" />
 								</svg>
-								<span className="text-sm text-gray-600">Uploading...</span>
+								<span className="text-sm text-gray-600">{t('contracts.uploading')}</span>
 							</div>
 						) : (
 							<div className="flex flex-col items-center">
@@ -152,10 +154,10 @@ export default function FileUploadModal({
 									<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M7 16a4 4 0 01-.88-7.903A5 5 0 1115.9 6L16 6a5 5 0 011 9.9M15 13l-3-3m0 0l-3 3m3-3v12" />
 								</svg>
 								<span className="text-sm font-medium text-gray-900 mb-2">
-									Drop files here or click to browse
+									{t('contracts.dropFilesHere')}
 								</span>
 								<span className="text-xs text-gray-500 mb-4">
-									PDF, DOC, XLS, Images up to 10MB
+									{t('contracts.supportedFiles')}
 								</span>
 								<Button
 									type="button"
@@ -163,7 +165,7 @@ export default function FileUploadModal({
 									onClick={onButtonClick}
 									disabled={uploading}
 								>
-									Choose File
+									{t('contracts.chooseFile')}
 								</Button>
 							</div>
 						)}
@@ -177,7 +179,7 @@ export default function FileUploadModal({
 						onClick={onClose}
 						disabled={uploading}
 					>
-						Cancel
+						{t('common.cancel')}
 					</Button>
 				</div>
 			</div>
diff --git a/src/lib/i18n.js b/src/lib/i18n.js
index f0940cc..e63ab32 100644
--- a/src/lib/i18n.js
+++ b/src/lib/i18n.js
@@ -198,6 +198,7 @@ const translations = {
     contracts: {
       title: "Umowy",
       subtitle: "---",
+      contract: "Umowa",
       newContract: "Nowa umowa",
       editContract: "Edytuj umowę",
       deleteContract: "Usuń umowę",
@@ -226,7 +227,50 @@ const translations = {
       signedOn: "Zawarcie:",
       finishOn: "Zakończenie:",
       customerLabel: "Zleceniodawca:",
-      investorLabel: "Inwestor:"
+      investorLabel: "Inwestor:",
+      loadingContractDetails: "Ładowanie szczegółów umowy...",
+      contractNotFound: "Umowa nie została znaleziona.",
+      backToContracts: "Powrót do umów",
+      addProject: "Dodaj projekt",
+      contractInformation: "Informacje o umowie",
+      contractNumber: "Numer umowy",
+      contractName: "Nazwa umowy",
+      customerContractNumber: "Numer umowy klienta",
+      customer: "Klient",
+      investor: "Inwestor",
+      dateSigned: "Data zawarcia",
+      finishDate: "Data zakończenia",
+      summary: "Podsumowanie",
+      projectsCount: "Liczba projektów",
+      projects: "projektów",
+      contractStatus: "Status umowy",
+      active: "Aktywna",
+      expired: "Przeterminowana",
+      contractDocuments: "Dokumenty umowy",
+      uploadDocument: "Prześlij dokument",
+      associatedProjects: "Powiązane projekty",
+      noProjectsYet: "Brak projektów",
+      getStartedMessage: "Rozpocznij od utworzenia pierwszego projektu dla tej umowy",
+      createFirstProject: "Utwórz pierwszy projekt",
+      viewDetails: "Zobacz szczegóły",
+      createNewContract: "Utwórz nową umowę",
+      addNewContractDescription: "Dodaj nową umowę do swojego portfolio",
+      contractDetails: "Szczegóły umowy",
+      failedToCreateContract: "Nie udało się utworzyć umowy. Sprawdź dane i spróbuj ponownie.",
+      // File upload translations
+      uploadDocumentTitle: "Prześlij dokument",
+      descriptionOptional: "Opis (opcjonalny)",
+      descriptionPlaceholder: "Krótki opis dokumentu...",
+      uploading: "Przesyłanie...",
+      dropFilesHere: "Upuść pliki tutaj lub kliknij, aby przeglądać",
+      supportedFiles: "PDF, DOC, XLS, Obrazy do 10MB",
+      chooseFile: "Wybierz plik",
+      failedToUploadFile: "Nie udało się przesłać pliku",
+      loadingFiles: "Ładowanie plików...",
+      noDocumentsUploaded: "Brak przesłanych dokumentów",
+      download: "Pobierz",
+      confirmDeleteFile: "Czy na pewno chcesz usunąć ten plik?",
+      failedToDeleteFile: "Nie udało się usunąć pliku"
     },
 
     // Tasks