diff --git a/src/components/settings/sections/GeneralSettings.test.tsx b/src/components/settings/sections/GeneralSettings.test.tsx
index 80c756e..c744b97 100644
--- a/src/components/settings/sections/GeneralSettings.test.tsx
+++ b/src/components/settings/sections/GeneralSettings.test.tsx
@@ -178,7 +178,7 @@ describe('GeneralSettings', () => {
   it('renders and persists the auto-compact threshold', async () => {
     renderSettings();
 
-    const select = await screen.findByLabelText('Auto-Compact Threshold');
+    const select = await screen.findByLabelText(translate('settings.general.autoCompactThreshold.label', undefined, 'en_us'));
     expect((select as HTMLSelectElement).value).toBe('90');
 
     fireEvent.change(select, { target: { value: '80' } });
@@ -188,6 +188,14 @@ describe('GeneralSettings', () => {
     });
   });
 
+  it('renders the auto-compact threshold label from the zh_cn catalog', async () => {
+    renderSettings('zh_cn');
+
+    expect(
+      await screen.findByLabelText(translate('settings.general.autoCompactThreshold.label', undefined, 'zh_cn')),
+    ).toBeTruthy();
+  });
+
   it('renders and persists local runtime download URLs', async () => {
     renderSettings();
 
diff --git a/src/components/settings/sections/GeneralSettings.tsx b/src/components/settings/sections/GeneralSettings.tsx
index 2c15d8e..9d937af 100644
--- a/src/components/settings/sections/GeneralSettings.tsx
+++ b/src/components/settings/sections/GeneralSettings.tsx
@@ -426,7 +426,7 @@ const GeneralSettings: React.FC = () => {
 
           <div className="settings-item">
             <label className="settings-label" htmlFor="general-auto-compact-threshold">
-              Auto-Compact Threshold
+              {t('settings.general.autoCompactThreshold.label')}
             </label>
             <select
               id="general-auto-compact-threshold"
@@ -434,12 +434,12 @@ const GeneralSettings: React.FC = () => {
               value={autoCompactThresholdPercent}
               onChange={(e) => void handleAutoCompactThresholdChange(e.target.value)}
             >
-              <option value="95">Conservative (95%)</option>
-              <option value="90">Standard (90%)</option>
-              <option value="80">Early (80%)</option>
+              <option value="95">{t('settings.general.autoCompactThreshold.conservative')}</option>
+              <option value="90">{t('settings.general.autoCompactThreshold.standard')}</option>
+              <option value="80">{t('settings.general.autoCompactThreshold.early')}</option>
             </select>
             <div className="settings-help" style={{ fontSize: '12px', color: '#888', marginTop: '4px' }}>
-              Compact the conversation before the next request when estimated context usage reaches this level.
+              {t('settings.general.autoCompactThreshold.help')}
             </div>
           </div>
         </div>
diff --git a/src/i18n/messages/en_us.ts b/src/i18n/messages/en_us.ts
index 4ebd7d9..7ad4dd0 100644
--- a/src/i18n/messages/en_us.ts
+++ b/src/i18n/messages/en_us.ts
@@ -44,6 +44,11 @@ export const enUsMessages: TranslationMessages = {
   'settings.general.llmProvider.openaiCompatible': 'OpenAI Compatible (e.g. OpenRouter, Ollama)',
   'settings.general.persistKeys.label': 'Persist API Keys on Non-Localhost',
   'settings.general.persistKeys.help': 'When enabled, API keys will be saved to browser storage even on non-localhost environments. Warning: This may increase security vulnerability to XSS attacks.',
+  'settings.general.autoCompactThreshold.label': 'Auto-Compact Threshold',
+  'settings.general.autoCompactThreshold.help': 'Compact the conversation before the next request when estimated context usage reaches this level.',
+  'settings.general.autoCompactThreshold.conservative': 'Conservative (95%)',
+  'settings.general.autoCompactThreshold.standard': 'Standard (90%)',
+  'settings.general.autoCompactThreshold.early': 'Early (80%)',
   'settings.general.localRuntime.cachedStatus': 'Cached Model Status',
   'settings.general.localRuntime.cacheChecking': 'Checking local model cache...',
   'settings.general.localRuntime.cacheDownloaded': 'Downloaded in browser cache.',
diff --git a/src/i18n/messages/fr_fr.ts b/src/i18n/messages/fr_fr.ts
index 42b77a8..ba8a647 100644
--- a/src/i18n/messages/fr_fr.ts
+++ b/src/i18n/messages/fr_fr.ts
@@ -41,6 +41,11 @@ export const frFrMessages: TranslationMessages = {
   'settings.general.llmProvider.openaiCompatible': 'Serveur compatible OpenAI (ex. OpenRouter, Ollama)',
   'settings.general.persistKeys.label': 'Conserver les clés API hors localhost',
   'settings.general.persistKeys.help': 'Si cette option est activée, les clés API sont enregistrées dans le stockage du navigateur même hors localhost. Attention : cela peut augmenter le risque lié aux attaques XSS.',
+  'settings.general.autoCompactThreshold.label': 'Seuil d’auto-compactage',
+  'settings.general.autoCompactThreshold.help': 'Compacte la conversation avant la prochaine requête lorsque l’utilisation estimée du contexte atteint ce niveau.',
+  'settings.general.autoCompactThreshold.conservative': 'Prudent (95 %)',
+  'settings.general.autoCompactThreshold.standard': 'Standard (90 %)',
+  'settings.general.autoCompactThreshold.early': 'Précoce (80 %)',
   'settings.general.localRuntime.cachedStatus': 'État du modèle en cache',
   'settings.general.localRuntime.cacheChecking': 'Vérification du cache du modèle local...',
   'settings.general.localRuntime.cacheDownloaded': 'Téléchargé dans le cache du navigateur.',
diff --git a/src/i18n/messages/zh_cn.ts b/src/i18n/messages/zh_cn.ts
index fd1f896..34210c0 100644
--- a/src/i18n/messages/zh_cn.ts
+++ b/src/i18n/messages/zh_cn.ts
@@ -42,6 +42,11 @@ export const zhCnMessages: TranslationMessages = {
   'settings.general.llmProvider.openaiCompatible': 'OpenAI 兼容服务（例如 OpenRouter、Ollama）',
   'settings.general.persistKeys.label': '在非 localhost 环境持久化 API Key',
   'settings.general.persistKeys.help': '启用后，即使在非 localhost 环境下，API Key 也会保存到浏览器存储中。警告：这可能增加 XSS 攻击带来的安全风险。',
+  'settings.general.autoCompactThreshold.label': '自动压缩阈值',
+  'settings.general.autoCompactThreshold.help': '当预估上下文使用量达到此级别时，在下一次请求前压缩对话。',
+  'settings.general.autoCompactThreshold.conservative': '保守（95%）',
+  'settings.general.autoCompactThreshold.standard': '标准（90%）',
+  'settings.general.autoCompactThreshold.early': '提前（80%）',
   'settings.general.localRuntime.cachedStatus': '缓存模型状态',
   'settings.general.localRuntime.cacheChecking': '正在检查本地模型缓存...',
   'settings.general.localRuntime.cacheDownloaded': '已下载到浏览器缓存。',
diff --git a/src/i18n/messages/zh_hk.ts b/src/i18n/messages/zh_hk.ts
index fdcc596..0da2485 100644
--- a/src/i18n/messages/zh_hk.ts
+++ b/src/i18n/messages/zh_hk.ts
@@ -42,6 +42,11 @@ export const zhHkMessages: TranslationMessages = {
   'settings.general.llmProvider.openaiCompatible': 'OpenAI 兼容服務（例如 OpenRouter、Ollama）',
   'settings.general.persistKeys.label': '在非 localhost 環境持久化 API Key',
   'settings.general.persistKeys.help': '啟用後，即使在非 localhost 環境下，API Key 也會儲存到瀏覽器儲存空間中。警告：這可能增加 XSS 攻擊帶來的安全風險。',
+  'settings.general.autoCompactThreshold.label': '自動壓縮閾值',
+  'settings.general.autoCompactThreshold.help': '當預估上下文使用量達到此級別時，在下一次請求前壓縮對話。',
+  'settings.general.autoCompactThreshold.conservative': '保守（95%）',
+  'settings.general.autoCompactThreshold.standard': '標準（90%）',
+  'settings.general.autoCompactThreshold.early': '提前（80%）',
   'settings.general.localRuntime.cachedStatus': '緩存模型狀態',
   'settings.general.localRuntime.cacheChecking': '正在檢查本地模型緩存...',
   'settings.general.localRuntime.cacheDownloaded': '已下載到瀏覽器緩存。',