diff --git a/packages/ui/src/lib/i18n/bootstrap.ts b/packages/ui/src/lib/i18n/bootstrap.ts
index 1c6ac1bb..dc712f63 100644
--- a/packages/ui/src/lib/i18n/bootstrap.ts
+++ b/packages/ui/src/lib/i18n/bootstrap.ts
@@ -57,6 +57,139 @@ const FR_MESSAGES: BootstrapMessages = {
   loadingData: (providersText, agentsText) => `Chargement des données (${providersText}, ${agentsText})…`,
 };
 
+const ZH_CN_MESSAGES: BootstrapMessages = {
+  startingApi: '正在启动 OpenCode API…',
+  initializing: '正在初始化…',
+  connecting: '正在连接…',
+  connected: '已连接！',
+  connectionError: '连接错误',
+  disconnected: '已断开连接',
+  reconnecting: '正在重新连接…',
+  initialDataLoadFailed: 'OpenCode 已连接，但初始数据加载失败。',
+  cliNotFound: '未找到 OpenCode CLI。请先安装它。',
+  providersReady: '✓ 提供商',
+  providersLoading: '… 提供商',
+  agentsReady: '✓ 智能体',
+  agentsLoading: '… 智能体',
+  startingDevServer: (hostLabel) => `正在启动 webview 开发服务器 (${hostLabel})...`,
+  waitingDevServer: (hostLabel, attempt) => `正在等待 webview 开发服务器 (${hostLabel})... 第 ${attempt} 次尝试`,
+  loadingData: (providersText, agentsText) => `正在加载数据 (${providersText}, ${agentsText})…`,
+};
+
+const ZH_TW_MESSAGES: BootstrapMessages = {
+  startingApi: '正在啟動 OpenCode API…',
+  initializing: '正在初始化…',
+  connecting: '正在連線…',
+  connected: '已連線！',
+  connectionError: '連線錯誤',
+  disconnected: '已中斷連線',
+  reconnecting: '正在重新連線…',
+  initialDataLoadFailed: 'OpenCode 已連線，但初始資料載入失敗。',
+  cliNotFound: '找不到 OpenCode CLI。請先安裝。',
+  providersReady: '✓ 提供者',
+  providersLoading: '… 提供者',
+  agentsReady: '✓ 代理',
+  agentsLoading: '… 代理',
+  startingDevServer: (hostLabel) => `正在啟動 webview 開發伺服器 (${hostLabel})...`,
+  waitingDevServer: (hostLabel, attempt) => `正在等待 webview 開發伺服器 (${hostLabel})... 第 ${attempt} 次嘗試`,
+  loadingData: (providersText, agentsText) => `正在載入資料 (${providersText}, ${agentsText})…`,
+};
+
+const UK_MESSAGES: BootstrapMessages = {
+  startingApi: 'Запуск OpenCode API…',
+  initializing: 'Ініціалізація…',
+  connecting: 'Підключення…',
+  connected: 'Підключено!',
+  connectionError: 'Помилка підключення',
+  disconnected: 'Відключено',
+  reconnecting: 'Повторне підключення…',
+  initialDataLoadFailed: 'OpenCode підключено, але початкове завантаження даних не вдалося.',
+  cliNotFound: 'OpenCode CLI не знайдено. Спершу встановіть його.',
+  providersReady: '✓ Провайдери',
+  providersLoading: '… Провайдери',
+  agentsReady: '✓ Агенти',
+  agentsLoading: '… Агенти',
+  startingDevServer: (hostLabel) => `Запуск dev-сервера webview (${hostLabel})...`,
+  waitingDevServer: (hostLabel, attempt) => `Очікування dev-сервера webview (${hostLabel})... спроба ${attempt}`,
+  loadingData: (providersText, agentsText) => `Завантаження даних (${providersText}, ${agentsText})…`,
+};
+
+const ES_MESSAGES: BootstrapMessages = {
+  startingApi: 'Iniciando la API de OpenCode…',
+  initializing: 'Inicializando…',
+  connecting: 'Conectando…',
+  connected: '¡Conectado!',
+  connectionError: 'Error de conexión',
+  disconnected: 'Desconectado',
+  reconnecting: 'Reconectando…',
+  initialDataLoadFailed: 'OpenCode se conectó, pero falló la carga inicial de datos.',
+  cliNotFound: 'No se encontró OpenCode CLI. Instálalo primero.',
+  providersReady: '✓ Proveedores',
+  providersLoading: '… Proveedores',
+  agentsReady: '✓ Agentes',
+  agentsLoading: '… Agentes',
+  startingDevServer: (hostLabel) => `Iniciando el servidor de desarrollo de webview (${hostLabel})...`,
+  waitingDevServer: (hostLabel, attempt) => `Esperando el servidor de desarrollo de webview (${hostLabel})... intento ${attempt}`,
+  loadingData: (providersText, agentsText) => `Cargando datos (${providersText}, ${agentsText})…`,
+};
+
+const PT_BR_MESSAGES: BootstrapMessages = {
+  startingApi: 'Iniciando a API do OpenCode…',
+  initializing: 'Inicializando…',
+  connecting: 'Conectando…',
+  connected: 'Conectado!',
+  connectionError: 'Erro de conexão',
+  disconnected: 'Desconectado',
+  reconnecting: 'Reconectando…',
+  initialDataLoadFailed: 'OpenCode conectado, mas o carregamento inicial dos dados falhou.',
+  cliNotFound: 'OpenCode CLI não encontrado. Instale-o primeiro.',
+  providersReady: '✓ Provedores',
+  providersLoading: '… Provedores',
+  agentsReady: '✓ Agentes',
+  agentsLoading: '… Agentes',
+  startingDevServer: (hostLabel) => `Iniciando o servidor de desenvolvimento da webview (${hostLabel})...`,
+  waitingDevServer: (hostLabel, attempt) => `Aguardando o servidor de desenvolvimento da webview (${hostLabel})... tentativa ${attempt}`,
+  loadingData: (providersText, agentsText) => `Carregando dados (${providersText}, ${agentsText})…`,
+};
+
+const KO_MESSAGES: BootstrapMessages = {
+  startingApi: 'OpenCode API 시작 중…',
+  initializing: '초기화 중…',
+  connecting: '연결 중…',
+  connected: '연결됨!',
+  connectionError: '연결 오류',
+  disconnected: '연결 끊김',
+  reconnecting: '다시 연결 중…',
+  initialDataLoadFailed: 'OpenCode에 연결되었지만 초기 데이터 로드에 실패했습니다.',
+  cliNotFound: 'OpenCode CLI를 찾을 수 없습니다. 먼저 설치하세요.',
+  providersReady: '✓ 공급자',
+  providersLoading: '… 공급자',
+  agentsReady: '✓ 에이전트',
+  agentsLoading: '… 에이전트',
+  startingDevServer: (hostLabel) => `webview 개발 서버 시작 중 (${hostLabel})...`,
+  waitingDevServer: (hostLabel, attempt) => `webview 개발 서버 대기 중 (${hostLabel})... ${attempt}번째 시도`,
+  loadingData: (providersText, agentsText) => `데이터 로드 중 (${providersText}, ${agentsText})…`,
+};
+
+const PL_MESSAGES: BootstrapMessages = {
+  startingApi: 'Uruchamianie API OpenCode…',
+  initializing: 'Inicjalizacja…',
+  connecting: 'Łączenie…',
+  connected: 'Połączono!',
+  connectionError: 'Błąd połączenia',
+  disconnected: 'Rozłączono',
+  reconnecting: 'Ponowne łączenie…',
+  initialDataLoadFailed: 'OpenCode połączony, ale początkowe ładowanie danych nie powiodło się.',
+  cliNotFound: 'Nie znaleziono OpenCode CLI. Najpierw go zainstaluj.',
+  providersReady: '✓ Dostawcy',
+  providersLoading: '… Dostawcy',
+  agentsReady: '✓ Agenci',
+  agentsLoading: '… Agenci',
+  startingDevServer: (hostLabel) => `Uruchamianie serwera deweloperskiego webview (${hostLabel})...`,
+  waitingDevServer: (hostLabel, attempt) => `Oczekiwanie na serwer deweloperski webview (${hostLabel})... próba ${attempt}`,
+  loadingData: (providersText, agentsText) => `Ładowanie danych (${providersText}, ${agentsText})…`,
+};
+
 const JA_MESSAGES: BootstrapMessages = {
   startingApi: 'OpenCode API を起動中…',
   initializing: '初期化中…',
@@ -77,9 +210,20 @@ const JA_MESSAGES: BootstrapMessages = {
 };
 
 export const getBootstrapMessages = (locale: Locale): BootstrapMessages => {
-  if (locale === 'fr') return FR_MESSAGES;
-  if (locale === 'ja') return JA_MESSAGES;
-  return EN_MESSAGES;
+  return BOOTSTRAP_MESSAGES[locale];
+};
+
+const BOOTSTRAP_MESSAGES: Record<Locale, BootstrapMessages> = {
+  en: EN_MESSAGES,
+  fr: FR_MESSAGES,
+  'zh-CN': ZH_CN_MESSAGES,
+  'zh-TW': ZH_TW_MESSAGES,
+  uk: UK_MESSAGES,
+  es: ES_MESSAGES,
+  'pt-BR': PT_BR_MESSAGES,
+  ko: KO_MESSAGES,
+  pl: PL_MESSAGES,
+  ja: JA_MESSAGES,
 };
 
 export const readStoredLocaleForBootstrap = (): Locale => {