diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 67ed1ebd7c..0291b01f8f 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "agent-orchestrator",
-	"version": "0.0.0",
+	"version": "0.10.0",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "agent-orchestrator",
-			"version": "0.0.0",
+			"version": "0.10.0",
 			"license": "MIT",
 			"dependencies": {
 				"@radix-ui/react-dialog": "^1.1.16",
@@ -25,12 +25,14 @@
 				"class-variance-authority": "^0.7.1",
 				"clsx": "^2.1.1",
 				"electron-updater": "^6.8.9",
+				"i18next": "^26.3.4",
 				"lucide-react": "^1.17.0",
 				"openapi-fetch": "^0.17.0",
 				"posthog-js": "^1.390.2",
 				"radix-ui": "^1.5.0",
 				"react": "^19.2.7",
 				"react-dom": "^19.2.7",
+				"react-i18next": "^17.0.8",
 				"react-resizable-panels": "^4.11.2",
 				"tailwind-merge": "^3.6.0",
 				"zustand": "^5.0.14"
@@ -338,7 +340,6 @@
 			"version": "7.29.7",
 			"resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.29.7.tgz",
 			"integrity": "sha512-Nq8OhGWiZIZGV6hLHoyAKLLcJihP/xFeBMGJoUrxTX2psI8dCifzLhZISFb+VWS3wFMRDmCGw5R+dOySCqPLhw==",
-			"dev": true,
 			"license": "MIT",
 			"engines": {
 				"node": ">=6.9.0"
@@ -10629,6 +10630,15 @@
 				"node": "^20.19.0 || ^22.12.0 || >=24.0.0"
 			}
 		},
+		"node_modules/html-parse-stringify": {
+			"version": "3.0.1",
+			"resolved": "https://registry.npmjs.org/html-parse-stringify/-/html-parse-stringify-3.0.1.tgz",
+			"integrity": "sha512-KknJ50kTInJ7qIScF3jeaFRpMpE8/lfiTdzf/twXyPBLAGrLRTmkz3AdTnKeh40X8k9L2fdYwEp/42WGXIRGcg==",
+			"license": "MIT",
+			"dependencies": {
+				"void-elements": "3.1.0"
+			}
+		},
 		"node_modules/http-cache-semantics": {
 			"version": "4.2.0",
 			"resolved": "https://registry.npmjs.org/http-cache-semantics/-/http-cache-semantics-4.2.0.tgz",
@@ -10688,6 +10698,34 @@
 				"ms": "^2.0.0"
 			}
 		},
+		"node_modules/i18next": {
+			"version": "26.3.4",
+			"resolved": "https://registry.npmjs.org/i18next/-/i18next-26.3.4.tgz",
+			"integrity": "sha512-pa7m0d7pBDqGHZxljT+WPFeyFgQ7P7SciPPo1tTqYuO0z4sqADYhwnBESmmGp/wEof1inwdls/k8ZgTg8rxFHA==",
+			"funding": [
+				{
+					"type": "individual",
+					"url": "https://www.locize.com/i18next"
+				},
+				{
+					"type": "individual",
+					"url": "https://www.i18next.com/how-to/faq#i18next-is-awesome.-how-can-i-support-the-project"
+				},
+				{
+					"type": "individual",
+					"url": "https://www.locize.com"
+				}
+			],
+			"license": "MIT",
+			"peerDependencies": {
+				"typescript": "^5 || ^6"
+			},
+			"peerDependenciesMeta": {
+				"typescript": {
+					"optional": true
+				}
+			}
+		},
 		"node_modules/iconv-lite": {
 			"version": "0.4.24",
 			"resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.4.24.tgz",
@@ -13538,6 +13576,33 @@
 				"react": "^19.2.7"
 			}
 		},
+		"node_modules/react-i18next": {
+			"version": "17.0.8",
+			"resolved": "https://registry.npmjs.org/react-i18next/-/react-i18next-17.0.8.tgz",
+			"integrity": "sha512-0ooKbGLU8JXhe1zwpQUWIeXSgLPOfwJmgheWRIUpcoA0CpyabpGhayjdG+/eA5esC1AQ8h2jWpXjJfzQzeDOCw==",
+			"license": "MIT",
+			"dependencies": {
+				"@babel/runtime": "^7.29.2",
+				"html-parse-stringify": "^3.0.1",
+				"use-sync-external-store": "^1.6.0"
+			},
+			"peerDependencies": {
+				"i18next": ">= 26.2.0",
+				"react": ">= 16.8.0",
+				"typescript": "^5 || ^6"
+			},
+			"peerDependenciesMeta": {
+				"react-dom": {
+					"optional": true
+				},
+				"react-native": {
+					"optional": true
+				},
+				"typescript": {
+					"optional": true
+				}
+			}
+		},
 		"node_modules/react-is": {
 			"version": "17.0.2",
 			"resolved": "https://registry.npmjs.org/react-is/-/react-is-17.0.2.tgz",
@@ -14953,7 +15018,7 @@
 			"version": "5.9.3",
 			"resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
 			"integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
-			"dev": true,
+			"devOptional": true,
 			"license": "Apache-2.0",
 			"bin": {
 				"tsc": "bin/tsc",
@@ -15402,6 +15467,15 @@
 				}
 			}
 		},
+		"node_modules/void-elements": {
+			"version": "3.1.0",
+			"resolved": "https://registry.npmjs.org/void-elements/-/void-elements-3.1.0.tgz",
+			"integrity": "sha512-Dhxzh5HZuiHQhbvTW9AMetFfBHDMYpo23Uo9btPXgdYP+3T5S+p+jgNy7spra+veYhBP2dCSgxR/i2Y02h5/6w==",
+			"license": "MIT",
+			"engines": {
+				"node": ">=0.10.0"
+			}
+		},
 		"node_modules/w3c-xmlserializer": {
 			"version": "5.0.0",
 			"resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-5.0.0.tgz",
diff --git a/frontend/package.json b/frontend/package.json
index a70a05a573..3e39fd1e10 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -70,12 +70,14 @@
 		"class-variance-authority": "^0.7.1",
 		"clsx": "^2.1.1",
 		"electron-updater": "^6.8.9",
+		"i18next": "^26.3.4",
 		"lucide-react": "^1.17.0",
 		"openapi-fetch": "^0.17.0",
 		"posthog-js": "^1.390.2",
 		"radix-ui": "^1.5.0",
 		"react": "^19.2.7",
 		"react-dom": "^19.2.7",
+		"react-i18next": "^17.0.8",
 		"react-resizable-panels": "^4.11.2",
 		"tailwind-merge": "^3.6.0",
 		"zustand": "^5.0.14"
diff --git a/frontend/src/renderer/components/SessionsBoard.tsx b/frontend/src/renderer/components/SessionsBoard.tsx
index 0f0d20b14b..64a101edae 100644
--- a/frontend/src/renderer/components/SessionsBoard.tsx
+++ b/frontend/src/renderer/components/SessionsBoard.tsx
@@ -22,6 +22,7 @@ import { restartProjectOrchestrator } from "../lib/restart-orchestrator";
 import { prBrowserUrl, sessionPRDisplaySummaries } from "../lib/pr-display";
 import { cn } from "../lib/utils";
 import { useUiStore } from "../stores/ui-store";
+import { useTranslation } from "react-i18next";
 
 type SessionsBoardProps = {
 	/** When set, the board shows only this project's sessions. */
@@ -75,6 +76,7 @@ const COLUMNS: Column[] = [
 ];
 
 export function SessionsBoard({ projectId }: SessionsBoardProps) {
+	const { t } = useTranslation();
 	const navigate = useNavigate();
 	const queryClient = useQueryClient();
 	const workspaceQuery = useWorkspaceQuery();
@@ -160,7 +162,7 @@ export function SessionsBoard({ projectId }: SessionsBoardProps) {
 			// Never fail silently: the daemon's message (e.g. a worktree/branch
 			// conflict) is the only actionable signal the user gets.
 			console.error("Failed to spawn orchestrator:", err);
-			setSpawnError(err instanceof Error ? err.message : "Could not spawn orchestrator");
+			setSpawnError(err instanceof Error ? err.message : t("board.errors.spawnFailed"));
 		} finally {
 			setIsSpawning(false);
 		}
@@ -194,17 +196,17 @@ export function SessionsBoard({ projectId }: SessionsBoardProps) {
 				</span>
 			)}
 			<button
-				aria-label="New task"
+				aria-label={t("board.actions.newTask")}
 				className="dashboard-app-header__accent-btn"
 				disabled={isProjectRestarting}
 				onClick={() => setIsNewTaskOpen(true)}
 				type="button"
 			>
 				<Plus className="h-3.5 w-3.5" aria-hidden="true" />
-				New task
+				{t("board.actions.newTask")}
 			</button>
 			<button
-				aria-label={orchestrator ? "Orchestrator" : "Spawn Orchestrator"}
+				aria-label={orchestrator ? t("board.actions.orchestrator"): t("board.actions.spawnOrchestrator")}
 				className="dashboard-app-header__primary-btn"
 				disabled={isSpawning || isProjectRestarting}
 				onClick={() => void openOrchestrator()}
@@ -212,12 +214,12 @@ export function SessionsBoard({ projectId }: SessionsBoardProps) {
 			>
 				<OrchestratorIcon className="h-3.5 w-3.5" aria-hidden="true" />
 				{isProjectRestarting
-					? "Restarting..."
+					? t("board.actions.restarting")
 					: isSpawning
-						? "Spawning..."
+						? t("board.actions.spawning")
 						: orchestrator
-							? "Orchestrator"
-							: "Spawn Orchestrator"}
+							? t("board.actions.orchestrator")
+							: t("board.actions.spawnOrchestrator")}
 			</button>
 		</>
 	) : undefined;
@@ -229,8 +231,8 @@ export function SessionsBoard({ projectId }: SessionsBoardProps) {
 			    (review feedback on #2432). */}
 			{!showWelcome && (
 				<DashboardSubhead
-					title="Board"
-					subtitle="Live agent sessions flowing from work → review → merge."
+					title={t("board.title")}
+					subtitle={t("board.subtitle")}
 					actions={actions}
 				/>
 			)}
@@ -248,13 +250,13 @@ export function SessionsBoard({ projectId }: SessionsBoardProps) {
 								type="button"
 							>
 								<RotateCw className="size-3.5" aria-hidden="true" />
-								Restart
+								{t("board.actions.restart")}
 							</button>
 						) : null}
 					</div>
 				) : null}
 				{workspaceQuery.isError ? (
-					<p className="py-10 text-center text-[12px] text-passive">Could not load sessions.</p>
+					<p className="py-10 text-center text-[12px] text-passive">{t("board.errors.loadSessions")}</p>
 				) : showWelcome ? (
 					<BoardWelcome />
 				) : showProjectEmpty ? (
@@ -300,7 +302,7 @@ export function SessionsBoard({ projectId }: SessionsBoardProps) {
 						>
 							<path d="m9 18 6-6-6-6" />
 						</svg>
-						<span className="font-mono text-[10.5px] font-medium uppercase tracking-[0.05em]">Done / Terminated</span>
+						<span className="font-mono text-[10.5px] font-medium uppercase tracking-[0.05em]">{t("board.done")}</span>
 						<span className="ml-auto shrink-0 font-mono text-[10px] text-passive">{done.length}</span>
 					</button>
 					{doneExpanded && (
diff --git a/frontend/src/renderer/i18n/index.ts b/frontend/src/renderer/i18n/index.ts
new file mode 100644
index 0000000000..539c64bf4c
--- /dev/null
+++ b/frontend/src/renderer/i18n/index.ts
@@ -0,0 +1,50 @@
+import i18n from "i18next";
+import { initReactI18next } from "react-i18next";
+
+import en from "../i18n/locales/en.json";
+import zhCN from "../i18n/locales/zh-CN.json";
+
+type Locale = "en" | "zh-CN"
+const LOCAL_STORAGE_KEY = "ao.locale";
+
+function getStoredLocale() : Locale | null{
+    const stored = localStorage.getItem(LOCAL_STORAGE_KEY);
+    if (stored === "en" || stored === "zh-CN") {
+        return stored;
+    }
+    return null;
+}
+
+function detectLocale(): Locale {
+    const stored = getStoredLocale();
+    if(stored) return stored;
+    return navigator.language.startsWith("zh") ? "zh-CN" : "en";
+}
+
+function saveLocale(locale : Locale){
+    localStorage.setItem(LOCAL_STORAGE_KEY, locale);
+}
+
+i18n.on("languageChanged", (language) => {
+    if (language === "en" || language === "zh-CN") {
+        saveLocale(language);
+    }
+    document.documentElement.lang = language;
+});
+
+export function initialiseI18n(){
+    console.log("INITIALISED");
+    return i18n.use(initReactI18next).init({
+        resources: {
+            en: {translation: en},
+            "zh-CN": {translation: zhCN}
+        },
+        fallbackLng: "en",
+        lng: detectLocale(),
+        interpolation: {
+            escapeValue: false,
+        },
+    });
+}
+
+export default i18n;
\ No newline at end of file
diff --git a/frontend/src/renderer/i18n/locales/en.json b/frontend/src/renderer/i18n/locales/en.json
new file mode 100644
index 0000000000..175df832c3
--- /dev/null
+++ b/frontend/src/renderer/i18n/locales/en.json
@@ -0,0 +1,31 @@
+{
+  "board": {
+    "title": "Board",
+    "subtitle": "Live agent sessions flowing from work → review → merge.",
+
+    "columns": {
+      "working": "Working",
+      "action": "Needs you",
+      "pending": "In review",
+      "merge": "Ready to merge"
+    },
+
+    "actions": {
+      "newTask": "New Task",
+      "orchestrator": "Orchestrator",
+      "spawnOrchestrator": "Spawn Orchestrator",
+      "restart": "Restart",
+      "restarting": "Restarting...",
+      "spawning": "Spawning..."
+    },
+
+    "errors": {
+      "spawnFailed": "Could not spawn orchestrator",
+      "loadSessions": "Could not load sessions."
+    },
+
+    "done": "Done / Terminated",
+
+    "noPR": "No PR yet"
+  }
+}
\ No newline at end of file
diff --git a/frontend/src/renderer/i18n/locales/zh-CN.json b/frontend/src/renderer/i18n/locales/zh-CN.json
new file mode 100644
index 0000000000..aa0e0dc09e
--- /dev/null
+++ b/frontend/src/renderer/i18n/locales/zh-CN.json
@@ -0,0 +1,31 @@
+{
+  "board": {
+    "title": "看板",
+    "subtitle": "实时查看代理会话从开发 → 审查 → 合并的流程。",
+
+    "columns": {
+      "working": "开发中",
+      "action": "需要处理",
+      "pending": "审核中",
+      "merge": "准备合并"
+    },
+
+    "actions": {
+      "newTask": "新建任务",
+      "orchestrator": "编排器",
+      "spawnOrchestrator": "启动编排器",
+      "restart": "重启",
+      "restarting": "正在重启...",
+      "spawning": "正在启动..."
+    },
+
+    "errors": {
+      "spawnFailed": "无法启动编排器",
+      "loadSessions": "无法加载会话。"
+    },
+
+    "done": "已完成 / 已终止",
+
+    "noPR": "暂无 PR"
+  }
+}
\ No newline at end of file
diff --git a/frontend/src/renderer/main.tsx b/frontend/src/renderer/main.tsx
index a575674db2..ba0ec540e6 100644
--- a/frontend/src/renderer/main.tsx
+++ b/frontend/src/renderer/main.tsx
@@ -9,6 +9,7 @@ import { createAppRouter } from "./router";
 import { TelemetryBoundary } from "./components/TelemetryBoundary";
 import { initTelemetry } from "./lib/telemetry";
 import { startDaemonFailureTelemetry } from "./lib/daemon-telemetry";
+import { initialiseI18n } from "./i18n";
 
 const router = createAppRouter(queryClient);
 void initTelemetry();
@@ -20,6 +21,8 @@ declare module "@tanstack/react-router" {
 	}
 }
 
+void initialiseI18n();
+
 createRoot(document.getElementById("root") as HTMLElement).render(
 	<React.StrictMode>
 		<TelemetryBoundary>