diff --git a/apps/hadis/serializers/reference_v2.py b/apps/hadis/serializers/reference_v2.py
index 8b3c60a..0c39a44 100644
--- a/apps/hadis/serializers/reference_v2.py
+++ b/apps/hadis/serializers/reference_v2.py
@@ -339,10 +339,17 @@ def _get_request_lang_v2(serializer_instance) -> str:
     request = serializer_instance.context.get("request") if hasattr(serializer_instance, "context") and serializer_instance.context else None
     lang = None
     if request:
-        lang = getattr(request, "LANGUAGE_CODE", None) or request.headers.get("Accept-Language") or request.query_params.get("lang")
+        query_params = getattr(request, "query_params", None) or getattr(request, "GET", None)
+        if query_params:
+            lang = query_params.get("language_code") or query_params.get("lang")
+        if not lang and hasattr(request, "headers"):
+            lang = request.headers.get("Accept-Language")
+        if not lang:
+            lang = getattr(request, "LANGUAGE_CODE", None)
     if not lang:
-        lang = get_language() or "ru"
-    return str(lang).split(",")[0].split("-")[0].strip().lower() or "ru"
+        lang = get_language() or "en"
+    code = str(lang).split(",")[0].split(";")[0].split("-")[0].strip().lower()
+    return code if code in ("ru", "en", "ar") else "en"
 
 
 def _resolve_author_city(city_obj, fallback_json, request, arabic=False):
@@ -387,7 +394,9 @@ class _BaseBookAuthorV2Mixin(serializers.Serializer):
     known_as = LocalizedField()
     arabic_known_as = ArabicLocalizedField(source='known_as')
     scholarity = LocalizedField()
+    arabic_scholarity = ArabicLocalizedField(source='scholarity')
     tabaqa = LocalizedField()
+    arabic_tabaqa = ArabicLocalizedField(source='tabaqa')
     rutba = serializers.SerializerMethodField()
     rutba_detail = serializers.SerializerMethodField()
     features = serializers.SerializerMethodField()
@@ -470,7 +479,7 @@ class BookAuthorListSerializer(_BaseBookAuthorV2Mixin, serializers.ModelSerializ
         model = BookAuthor
         fields = [
             'id', 'slug', 'name', 'arabic_name', 'image',
-            'known_as', 'arabic_known_as', 'scholarity', 'tabaqa',
+            'known_as', 'arabic_known_as', 'scholarity', 'arabic_scholarity', 'tabaqa', 'arabic_tabaqa',
             'rutba', 'rutba_detail',
             'features', 'arabic_features', 'features_detail',
             'origin', 'arabic_origin', 'lived_in', 'arabic_lived_in', 'died_in', 'arabic_died_in',
@@ -488,7 +497,7 @@ class BookAuthorDetailSerializer(_BaseBookAuthorV2Mixin, serializers.ModelSerial
         model = BookAuthor
         fields = [
             'id', 'slug', 'name', 'arabic_name', 'image',
-            'known_as', 'arabic_known_as', 'scholarity', 'tabaqa',
+            'known_as', 'arabic_known_as', 'scholarity', 'arabic_scholarity', 'tabaqa', 'arabic_tabaqa',
             'rutba', 'rutba_detail',
             'features', 'arabic_features', 'features_detail',
             'origin', 'arabic_origin', 'lived_in', 'arabic_lived_in', 'died_in', 'arabic_died_in',
@@ -550,7 +559,9 @@ class BookAuthorSyncSerializer(_BaseBookAuthorV2Mixin, serializers.ModelSerializ
             'known_as', 
             'arabic_known_as',
             'scholarity', 
+            'arabic_scholarity',
             'tabaqa', 
+            'arabic_tabaqa',
             'rutba', 
             'rutba_detail',
             'features',