diff --git a/apps/client/lib/core/utils/recent_languages.dart b/apps/client/lib/core/utils/recent_languages.dart
new file mode 100644
index 00000000..c5114ef8
--- /dev/null
+++ b/apps/client/lib/core/utils/recent_languages.dart
@@ -0,0 +1,58 @@
+import 'package:get_storage/get_storage.dart';
+
+/// 语言选择弹窗的「最近使用」排序。
+///
+/// 语言表本身有几十项（面对面/同传/音视频共用 LanguageManager 那份），
+/// 每次都从头翻很慢，所以用过的往上提，最顶的是最近一次选的。
+///
+/// ⚠️ 源/目标**分开记**：同一个人的源语言常年是母语、目标语言才是变的那个，
+/// 合成一份会让刚选的目标语言跑到源语言列表顶上，越用越乱。
+class RecentLanguages {
+  RecentLanguages._();
+
+  /// 每侧最多记几个。再多就没有「置顶」的意义了，整张表都成了最近使用。
+  static const int maxKeep = 8;
+
+  static const String _sourceKey = 'recent_languages_source';
+  static const String _targetKey = 'recent_languages_target';
+
+  static String _keyOf(bool isSource) => isSource ? _sourceKey : _targetKey;
+
+  static final GetStorage _storage = GetStorage();
+
+  /// 读最近使用列表（最新的在前）。存储里可能是任意类型，逐项转字符串兜底。
+  static List<String> read(bool isSource) {
+    final raw = _storage.read(_keyOf(isSource));
+    if (raw is! List) return <String>[];
+    return raw
+        .map((e) => e?.toString() ?? '')
+        .where((e) => e.isNotEmpty)
+        .toList();
+  }
+
+  /// 记一次使用：已存在就提到最前，不重复占位。
+  static void touch(String language, {required bool isSource}) {
+    if (language.isEmpty) return;
+    final list = read(isSource)..remove(language);
+    list.insert(0, language);
+    if (list.length > maxKeep) list.removeRange(maxKeep, list.length);
+    _storage.write(_keyOf(isSource), list);
+  }
+
+  /// 按最近使用重排：用过的按使用顺序排在前面，其余保持原有顺序。
+  ///
+  /// 只提「本次列表里确实有」的语言 —— 各模块传进来的语言表不一样
+  /// （语音翻译走 LanguageManager、图片翻译另有一份），
+  /// 直接把记录拼上去会冒出当前模式根本不支持的语言。
+  static List<String> sort(List<String> languages, {required bool isSource}) {
+    final recent = read(isSource);
+    if (recent.isEmpty) return languages;
+
+    final remaining = List<String>.from(languages);
+    final ordered = <String>[];
+    for (final name in recent) {
+      if (remaining.remove(name)) ordered.add(name);
+    }
+    return [...ordered, ...remaining];
+  }
+}
diff --git a/apps/client/lib/modules/translation/controllers/translation_controller.dart b/apps/client/lib/modules/translation/controllers/translation_controller.dart
index 4eb0ebe9..07bf065c 100644
--- a/apps/client/lib/modules/translation/controllers/translation_controller.dart
+++ b/apps/client/lib/modules/translation/controllers/translation_controller.dart
@@ -6,6 +6,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:get/get.dart';
 import 'package:get_storage/get_storage.dart';
+import '../../../core/utils/recent_languages.dart';
 import 'package:intl/intl.dart';
 import 'package:floating_ui_plugin/native_plugin.dart';
 import 'package:path_provider/path_provider.dart';
@@ -2787,23 +2788,30 @@ class TranslationController extends GetxController with WidgetsBindingObserver {
   }
 
   /// 切换源语言和目标语言
-  Future<void> swapLanguages() => _runLanguageSwitch(() async {
-        if (!guardLanguageChange()) return;
-        final wasRecognizing = isRecognizing.value;
-        await stopAll();
+  Future<void> swapLanguages() => _runLanguageSwitch(_swapLanguagesInner);
 
-        final tempName = sourceLanguage.value;
-        sourceLanguage.value = targetLanguage.value;
-        targetLanguage.value = tempName;
+  /// 对调的实现体。**不包 [_runLanguageSwitch]** —— 选语言撞上对侧时要在
+  /// 已经排队进来的那一次切换里直接调它，再包一层会等自己前面那条链，死锁。
+  Future<void> _swapLanguagesInner() async {
+    if (!guardLanguageChange()) return;
+    final wasRecognizing = isRecognizing.value;
+    await stopAll();
 
-        final tempCode = sourceLanguageCode.value;
-        sourceLanguageCode.value = targetLanguageCode.value;
-        targetLanguageCode.value = tempCode;
+    final tempName = sourceLanguage.value;
+    sourceLanguage.value = targetLanguage.value;
+    targetLanguage.value = tempName;
 
-        _saveSourceLanguageSetting(isUserSet: true);
-        _saveTargetLanguageSetting();
-        await _reinitializeAsrService(restartRecognition: wasRecognizing);
-      });
+    final tempCode = sourceLanguageCode.value;
+    sourceLanguageCode.value = targetLanguageCode.value;
+    targetLanguageCode.value = tempCode;
+
+    RecentLanguages.touch(sourceLanguage.value, isSource: true);
+    RecentLanguages.touch(targetLanguage.value, isSource: false);
+
+    _saveSourceLanguageSetting(isUserSet: true);
+    _saveTargetLanguageSetting();
+    await _reinitializeAsrService(restartRecognition: wasRecognizing);
+  }
 
   /// 设置源语言
   /// [language] 语言名称
@@ -2979,6 +2987,9 @@ class TranslationController extends GetxController with WidgetsBindingObserver {
           Logger.d(TAG, '触发加载更多翻译历史记录（reverse模式）');
           loadMoreHistory();
         }
+        // 选中的正是目标语言 → 两边对调，而不是让源=目标。
+        // （语言弹窗左右两侧给的是同一张完整表，撞上是正常操作，见 LanguageSelectionDialog）
+        if (targetLanguage.value == language) return _swapLanguagesInner();
       }
     });
 
@@ -2998,6 +3009,8 @@ class TranslationController extends GetxController with WidgetsBindingObserver {
   /// [timestamp] 时间戳
   void deleteTranslationItem(String sessionId, DateTime timestamp) =>
       _historyManager.deleteTranslationItem(sessionId, timestamp);
+        // 选中的正是源语言 → 两边对调（同上）
+        if (sourceLanguage.value == language) return _swapLanguagesInner();
 
   /// 获取所有历史记录
   /// 返回所有翻译项列表
diff --git a/apps/client/lib/modules/translation/views/dialogs/language_selection_dialog.dart b/apps/client/lib/modules/translation/views/dialogs/language_selection_dialog.dart
index 3301ee72..ac6b4955 100644
--- a/apps/client/lib/modules/translation/views/dialogs/language_selection_dialog.dart
+++ b/apps/client/lib/modules/translation/views/dialogs/language_selection_dialog.dart
@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:get/get.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
+import '../../../../core/utils/recent_languages.dart';
 import '../../controllers/translation_controller.dart';
 
 /// 语言选择对话框
@@ -12,7 +13,11 @@ class LanguageSelectionDialog {
   /// [currentLanguage] 当前选中的语言中文名称
   /// [includeAutoDetect] 是否在源语言首项加入“自动检测”选项（仅文本翻译需要）
   /// [translateLanguageNames] 是否将语言名称作为翻译键进行翻译（语音翻译保持原逻辑）
-  /// [excludeLanguage] 需排除的语言中文名称（防止原语言与目标语言相同）
+  /// [excludeLanguage] 需排除的语言中文名称。
+  ///   ⚠️ 语音翻译（同传/面对面/音视频）**不要传**：左右两侧看到的应该是同一张完整语言表，
+  ///   把对侧已选的那项从列表里删掉，会让人以为那个语言没了。源=目标由 controller 的
+  ///   setSourceLanguage/setTargetLanguage 在选中时**对调**来避免。
+  ///   文本/图片翻译的源语言有「自动检测」，对调会把它挪进目标语言（非法值），故仍走排除。
   /// [onSelected] 选中项回调，参数为中文名称
   static void show(
     bool isSource,
@@ -34,11 +39,15 @@ class LanguageSelectionDialog {
 
     final displayLanguages = List<String>.from(languages ?? fallbackLanguages);
 
-    // 过滤掉对侧已选语言，防止原语言与目标语言相同
+    // 过滤掉对侧已选语言，防止原语言与目标语言相同（仅文本/图片翻译传，见上方说明）
     if (excludeLanguage != null && excludeLanguage.isNotEmpty) {
       displayLanguages.remove(excludeLanguage);
     }
 
+    // 用过的语言置顶，最顶的是最近一次选的
+    final orderedLanguages =
+        RecentLanguages.sort(displayLanguages, isSource: isSource);
+
     // 源语言是否展示“自动检测”选项（仅列表显示，值为中文“自动检测”）
     final hasAutoDetect = includeAutoDetect && isSource;
 
@@ -92,14 +101,14 @@ class LanguageSelectionDialog {
                     mainAxisSize: MainAxisSize.min,
                     children: List.generate(
                       hasAutoDetect
-                          ? (displayLanguages.length + 1)
-                          : displayLanguages.length,
+                          ? (orderedLanguages.length + 1)
+                          : orderedLanguages.length,
                       (index) {
                         // 构造展示与实际值
                         final isAutoDetectItem = hasAutoDetect && index == 0;
                         final valueText = isAutoDetectItem
                             ? 'autoDetect'.tr
-                            : displayLanguages[
+                            : orderedLanguages[
                                 hasAutoDetect ? index - 1 : index];
                         final displayText = isAutoDetectItem
                             ? 'autoDetect'.tr // 自动检测
@@ -112,6 +121,11 @@ class LanguageSelectionDialog {
                         return GestureDetector(
                           // 改用手势检测器实现点击
                           onTap: () {
+                            // 记一次使用，下次这项排到最前（自动检测不是语言，不记）
+                            if (!isAutoDetectItem) {
+                              RecentLanguages.touch(valueText,
+                                  isSource: isSource);
+                            }
                             if (onSelected != null) {
                               onSelected(valueText);
                             } else {
diff --git a/apps/client/lib/modules/translation/views/widgets/face_to_face_layout.dart b/apps/client/lib/modules/translation/views/widgets/face_to_face_layout.dart
index b758b6ab..642afe57 100644
--- a/apps/client/lib/modules/translation/views/widgets/face_to_face_layout.dart
+++ b/apps/client/lib/modules/translation/views/widgets/face_to_face_layout.dart
@@ -260,10 +260,8 @@ class _FaceToFaceLayoutState extends State<FaceToFaceLayout> {
   void _showLanguageSelectionDialog(bool isSource, bool isDarkMode) {
     // 翻译进行中不开弹窗（见 controller.guardLanguageChange）
     if (!widget.controller.guardLanguageChange()) return;
+    // 不传 excludeLanguage：两侧列表保持一致，选到对侧语言时 controller 对调
     LanguageSelectionDialog.show(isSource, isDarkMode,
-        excludeLanguage: isSource
-            ? widget.controller.targetLanguage.value
-            : widget.controller.sourceLanguage.value,
         translationController: widget.controller);
   }
 }