diff --git a/packages/backend/src/services/notification.service.ts b/packages/backend/src/services/notification.service.ts
index 1bb2db8..66d8089 100644
--- a/packages/backend/src/services/notification.service.ts
+++ b/packages/backend/src/services/notification.service.ts
@@ -268,16 +268,27 @@ export class NotificationService {
     async sendNotification(event: NotificationEvent, details?: Record<string, any> | string): Promise<void> {
         console.log(`[通知] 事件触发: ${event}`, details || '');
 
-        let userLang = defaultLng;
-        try {
-            const langSetting = await settingsService.getSetting('language');
-            if (langSetting && supportedLngs.includes(langSetting)) {
-                userLang = langSetting;
+        let userLang = defaultLng; // Start with default
+
+        // --- 修改开始 ---
+        // 如果是设置更新事件，并且更新了语言，直接从 details 中获取新语言值
+        if (event === 'SETTINGS_UPDATED' && typeof details === 'object' && details?.updatedKeys?.includes('language') && typeof details?.language === 'string' && supportedLngs.includes(details.language)) {
+             userLang = details.language;
+             console.log(`[通知] 事件 ${event} 检测到语言更新，直接使用新值 '${userLang}' (来自事件详情)`);
+        } else {
+            // 对于其他事件或未更新语言的设置更新，才从数据库查询
+            try {
+                const langSetting = await settingsService.getSetting('language');
+                if (langSetting && supportedLngs.includes(langSetting)) {
+                    userLang = langSetting;
+                }
+            } catch (error) {
+                console.error(`[通知] 获取事件 ${event} 的语言设置时出错:`, error);
             }
-        } catch (error) {
-            console.error(`[通知] 获取事件 ${event} 的语言设置时出错:`, error);
+            console.log(`[通知] 事件 ${event} 使用语言 '${userLang}' (来自数据库或默认)`);
         }
-        console.log(`[通知] 事件 ${event} 使用语言 '${userLang}'`);
+        // --- 修改结束 ---
+
 
         const payload: NotificationPayload = {
             event,