diff --git a/src/main/java/com/yolo/keyborad/service/impl/KeyboardAiCompanionServiceImpl.java b/src/main/java/com/yolo/keyborad/service/impl/KeyboardAiCompanionServiceImpl.java
index 8f3df20..3f89d8f 100644
--- a/src/main/java/com/yolo/keyborad/service/impl/KeyboardAiCompanionServiceImpl.java
+++ b/src/main/java/com/yolo/keyborad/service/impl/KeyboardAiCompanionServiceImpl.java
@@ -24,6 +24,7 @@ import com.yolo.keyborad.service.KeyboardAiCompanionService;
 import org.springframework.util.StringUtils;
 
 import java.util.Collections;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -36,6 +37,8 @@ import java.util.stream.Collectors;
 @Service
 public class KeyboardAiCompanionServiceImpl extends ServiceImpl<KeyboardAiCompanionMapper, KeyboardAiCompanion> implements KeyboardAiCompanionService {
 
+    private static final String DEFAULT_FALLBACK_LOCALE = "en";
+
     @Resource
     private KeyboardAiCompanionLikeService companionLikeService;
 
@@ -326,6 +329,29 @@ public class KeyboardAiCompanionServiceImpl extends ServiceImpl<KeyboardAiCompan
 
     private Map<Long, KeyboardAiCompanionI18n> getCompanionI18nMap(List<Long> companionIds, String acceptLanguage) {
         String locale = RequestLocaleUtils.resolveLanguage(acceptLanguage);
+        if (companionIds == null || companionIds.isEmpty() || !StringUtils.hasText(locale)) {
+            return Collections.emptyMap();
+        }
+        Map<Long, KeyboardAiCompanionI18n> requestedLocaleMap = queryI18nMap(companionIds, locale);
+        if (requestedLocaleMap.size() == companionIds.size() || DEFAULT_FALLBACK_LOCALE.equalsIgnoreCase(locale)) {
+            return requestedLocaleMap;
+        }
+        List<Long> missingCompanionIds = companionIds.stream()
+                .filter(companionId -> !requestedLocaleMap.containsKey(companionId))
+                .toList();
+        if (missingCompanionIds.isEmpty()) {
+            return requestedLocaleMap;
+        }
+        Map<Long, KeyboardAiCompanionI18n> fallbackMap = queryI18nMap(missingCompanionIds, DEFAULT_FALLBACK_LOCALE);
+        if (fallbackMap.isEmpty()) {
+            return requestedLocaleMap;
+        }
+        Map<Long, KeyboardAiCompanionI18n> mergedMap = new LinkedHashMap<>(requestedLocaleMap);
+        fallbackMap.forEach(mergedMap::putIfAbsent);
+        return mergedMap;
+    }
+
+    private Map<Long, KeyboardAiCompanionI18n> queryI18nMap(List<Long> companionIds, String locale) {
         if (companionIds == null || companionIds.isEmpty() || !StringUtils.hasText(locale)) {
             return Collections.emptyMap();
         }
diff --git a/src/main/java/com/yolo/keyborad/service/impl/KeyboardCharacterServiceImpl.java b/src/main/java/com/yolo/keyborad/service/impl/KeyboardCharacterServiceImpl.java
index 134c54d..2774324 100644
--- a/src/main/java/com/yolo/keyborad/service/impl/KeyboardCharacterServiceImpl.java
+++ b/src/main/java/com/yolo/keyborad/service/impl/KeyboardCharacterServiceImpl.java
@@ -42,6 +42,7 @@ import java.util.stream.Stream;
 @Service
 public class KeyboardCharacterServiceImpl extends ServiceImpl<KeyboardCharacterMapper, KeyboardCharacter> implements KeyboardCharacterService{
 
+    private static final String DEFAULT_FALLBACK_LOCALE = "en";
     private static final String CHARACTER_CACHE_KEY_PREFIX = "character:";
     private static final String CHARACTER_LIST_CACHE_KEY = "character:list:all";
     private static final String CHARACTER_TAG_CACHE_KEY_PREFIX = "character:list:tag:";
@@ -353,6 +354,29 @@ public class KeyboardCharacterServiceImpl extends ServiceImpl<KeyboardCharacterM
         if (characterIds == null || characterIds.isEmpty()) {
             return Collections.emptyMap();
         }
+        Map<Long, KeyboardCharacterI18n> requestedLocaleMap = queryI18nMap(characterIds, locale);
+        if (requestedLocaleMap.size() == characterIds.size() || DEFAULT_FALLBACK_LOCALE.equalsIgnoreCase(locale)) {
+            return requestedLocaleMap;
+        }
+        List<Long> missingCharacterIds = characterIds.stream()
+                .filter(characterId -> !requestedLocaleMap.containsKey(characterId))
+                .toList();
+        if (missingCharacterIds.isEmpty()) {
+            return requestedLocaleMap;
+        }
+        Map<Long, KeyboardCharacterI18n> fallbackMap = queryI18nMap(missingCharacterIds, DEFAULT_FALLBACK_LOCALE);
+        if (fallbackMap.isEmpty()) {
+            return requestedLocaleMap;
+        }
+        Map<Long, KeyboardCharacterI18n> mergedMap = new LinkedHashMap<>(requestedLocaleMap);
+        fallbackMap.forEach(mergedMap::putIfAbsent);
+        return mergedMap;
+    }
+
+    private Map<Long, KeyboardCharacterI18n> queryI18nMap(List<Long> characterIds, String locale) {
+        if (characterIds == null || characterIds.isEmpty() || !StringUtils.hasText(locale)) {
+            return Collections.emptyMap();
+        }
         List<KeyboardCharacterI18n> i18nList = keyboardCharacterI18nMapper.selectList(
                 new LambdaQueryWrapper<KeyboardCharacterI18n>()
                         .eq(KeyboardCharacterI18n::getLocale, locale)
diff --git a/src/main/java/com/yolo/keyborad/service/impl/TagServiceImpl.java b/src/main/java/com/yolo/keyborad/service/impl/TagServiceImpl.java
index 14c854f..147ef0d 100644
--- a/src/main/java/com/yolo/keyborad/service/impl/TagServiceImpl.java
+++ b/src/main/java/com/yolo/keyborad/service/impl/TagServiceImpl.java
@@ -16,6 +16,7 @@ import org.springframework.stereotype.Service;
 import org.springframework.util.StringUtils;
 
 import java.util.Collections;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
@@ -27,6 +28,8 @@ import java.util.stream.Collectors;
 @Service
 public class TagServiceImpl extends ServiceImpl<KeyboardTagMapper, KeyboardTag> implements TagService {
 
+    private static final String DEFAULT_FALLBACK_LOCALE = "en";
+
     @Resource
     private KeyboardTagMapper keyboardTagMapper;
 
@@ -63,6 +66,29 @@ public class TagServiceImpl extends ServiceImpl<KeyboardTagMapper, KeyboardTag>
         if (tagIds == null || tagIds.isEmpty()) {
             return Collections.emptyMap();
         }
+        Map<Integer, KeyboardTagI18n> requestedLocaleMap = queryI18nMap(tagIds, locale);
+        if (requestedLocaleMap.size() == tagIds.size() || DEFAULT_FALLBACK_LOCALE.equalsIgnoreCase(locale)) {
+            return requestedLocaleMap;
+        }
+        List<Integer> missingTagIds = tagIds.stream()
+                .filter(tagId -> !requestedLocaleMap.containsKey(tagId))
+                .toList();
+        if (missingTagIds.isEmpty()) {
+            return requestedLocaleMap;
+        }
+        Map<Integer, KeyboardTagI18n> fallbackMap = queryI18nMap(missingTagIds, DEFAULT_FALLBACK_LOCALE);
+        if (fallbackMap.isEmpty()) {
+            return requestedLocaleMap;
+        }
+        Map<Integer, KeyboardTagI18n> mergedMap = new LinkedHashMap<>(requestedLocaleMap);
+        fallbackMap.forEach(mergedMap::putIfAbsent);
+        return mergedMap;
+    }
+
+    private Map<Integer, KeyboardTagI18n> queryI18nMap(List<Integer> tagIds, String locale) {
+        if (tagIds == null || tagIds.isEmpty() || !StringUtils.hasText(locale)) {
+            return Collections.emptyMap();
+        }
         List<KeyboardTagI18n> i18nList = keyboardTagI18nMapper.selectList(
                 new LambdaQueryWrapper<KeyboardTagI18n>()
                         .in(KeyboardTagI18n::getTagId, tagIds)