diff --git a/aiogram/contrib/middlewares/i18n.py b/aiogram/contrib/middlewares/i18n.py
index 58ef42b2..24c06671 100644
--- a/aiogram/contrib/middlewares/i18n.py
+++ b/aiogram/contrib/middlewares/i18n.py
@@ -136,6 +136,7 @@ class I18nMiddleware(BaseMiddleware):
             *_, data = args
             language = data['locale'] = locale.language
             return language
+        return None
 
     async def trigger(self, action, args):
         """