diff --git a/config/config.yaml b/config/config.yaml
index 198dad5..2bf6ddc 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -88,7 +88,6 @@ query_config:
   # 功能开关（翻译开关由tenant_config控制）
   enable_text_embedding: true
   enable_query_rewrite: true
-  enable_multilang_search: true  # 启用多语言搜索（使用翻译进行跨语言检索）
 
   # Embedding字段名称
   text_embedding_field: "title_embedding"
diff --git a/config/config_loader.py b/config/config_loader.py
index 6bd06af..b53f8e1 100644
--- a/config/config_loader.py
+++ b/config/config_loader.py
@@ -33,8 +33,7 @@ class QueryConfig:
     # Feature flags
     enable_text_embedding: bool = True
     enable_query_rewrite: bool = True
-    enable_multilang_search: bool = True  # Enable multi-language search using translations
-    
+
     # Query rewrite dictionary (loaded from external file)
     rewrite_dictionary: Dict[str, str] = field(default_factory=dict)
     
diff --git a/search/es_query_builder.py b/search/es_query_builder.py
index ae88d21..c767374 100644
--- a/search/es_query_builder.py
+++ b/search/es_query_builder.py
@@ -24,20 +24,21 @@ class ESQueryBuilder:
         image_embedding_field: Optional[str] = None,
         source_fields: Optional[List[str]] = None,
         function_score_config: Optional[FunctionScoreConfig] = None,
-        enable_multilang_search: bool = True,
         default_language: str = "en",
         knn_boost: float = 0.25
     ):
         """
         Initialize query builder.
 
+        Multi-language search (translation-based cross-language recall) is always enabled:
+        queries are matched against both detected-language and translated zh/en clauses.
+
         Args:
             match_fields: Fields to search for text matching
             text_embedding_field: Field name for text embeddings
             image_embedding_field: Field name for image embeddings
             source_fields: Fields to return in search results (_source includes)
             function_score_config: Function score configuration
-            enable_multilang_search: Enable multi-language search using translations
             default_language: Default language to use when detection fails or returns "unknown"
             knn_boost: Boost value for KNN (embedding recall)
         """
@@ -46,7 +47,6 @@ class ESQueryBuilder:
         self.image_embedding_field = image_embedding_field
         self.source_fields = source_fields
         self.function_score_config = function_score_config
-        self.enable_multilang_search = enable_multilang_search
         self.default_language = default_language
         self.knn_boost = knn_boost
 
@@ -488,35 +488,31 @@ class ESQueryBuilder:
             }
         })
         
-        # 2. Translation queries - lower boost (0.4) for other languages
-        if self.enable_multilang_search:
-            if language != 'zh' and translations.get('zh'):
-                zh_fields, _ = self._get_match_fields('zh')
-                should_clauses.append({
-                    "multi_match": {
-                        "query": translations['zh'],
-                        "fields": zh_fields,
-                        # "operator": "AND",
-                        "minimum_should_match": "75%",
-                        "tie_breaker": tie_breaker_base_query,
-                        "boost": 0.4,
-                        "_name": "base_query_trans_zh"
-                    }
-                })
-            
-            if language != 'en' and translations.get('en'):
-                en_fields, _ = self._get_match_fields('en')
-                should_clauses.append({
-                    "multi_match": {
-                        "query": translations['en'],
-                        "fields": en_fields,
-                        # "operator": "AND",
-                        "minimum_should_match": "75%",
-                        "tie_breaker": tie_breaker_base_query,
-                        "boost": 0.4,
-                        "_name": "base_query_trans_en"
-                    }
-                })
+        # 2. Translation queries - lower boost (0.4) for other languages (multi-language search always on)
+        if language != 'zh' and translations.get('zh'):
+            zh_fields, _ = self._get_match_fields('zh')
+            should_clauses.append({
+                "multi_match": {
+                    "query": translations['zh'],
+                    "fields": zh_fields,
+                    "minimum_should_match": "75%",
+                    "tie_breaker": tie_breaker_base_query,
+                    "boost": 0.4,
+                    "_name": "base_query_trans_zh"
+                }
+            })
+        if language != 'en' and translations.get('en'):
+            en_fields, _ = self._get_match_fields('en')
+            should_clauses.append({
+                "multi_match": {
+                    "query": translations['en'],
+                    "fields": en_fields,
+                    "minimum_should_match": "75%",
+                    "tie_breaker": tie_breaker_base_query,
+                    "boost": 0.4,
+                    "_name": "base_query_trans_en"
+                }
+            })
 
         if False and is_long_query:
             boost = 0.5 * pow(min(1.0, token_count / 10.0), 0.9)
diff --git a/search/searcher.py b/search/searcher.py
index 5536e21..4949da9 100644
--- a/search/searcher.py
+++ b/search/searcher.py
@@ -119,7 +119,6 @@ class Searcher:
             image_embedding_field=self.image_embedding_field,
             source_fields=self.source_fields,
             function_score_config=self.config.function_score,
-            enable_multilang_search=self.config.query_config.enable_multilang_search,
             default_language=self.config.query_config.default_language,
             knn_boost=self.config.query_config.knn_boost
         )
diff --git a/tests/test_embedding_pipeline.py b/tests/test_embedding_pipeline.py
index f524b38..1eab72c 100644
--- a/tests/test_embedding_pipeline.py
+++ b/tests/test_embedding_pipeline.py
@@ -77,7 +77,6 @@ def _build_test_config() -> SearchConfig:
             default_language="en",
             enable_text_embedding=True,
             enable_query_rewrite=False,
-            enable_multilang_search=True,
             rewrite_dictionary={},
             translation_prompts={"query_zh": "e-commerce domain", "query_en": "e-commerce domain"},
             text_embedding_field="title_embedding",
--
libgit2 0.21.2