From e67cecef34c404f764ba18e06f007637e1275d95 Mon Sep 17 00:00:00 2001
From: alfred richardsn <rchrdsn@protonmail.ch>
Date: Sun, 11 Apr 2021 18:08:36 +0300
Subject: [PATCH] Fix unused default locale in I18nMiddleware (#562)

---
 aiogram/contrib/middlewares/i18n.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/aiogram/contrib/middlewares/i18n.py b/aiogram/contrib/middlewares/i18n.py
index bb6d8003..508d017e 100644
--- a/aiogram/contrib/middlewares/i18n.py
+++ b/aiogram/contrib/middlewares/i18n.py
@@ -131,10 +131,11 @@ class I18nMiddleware(BaseMiddleware):
         user: types.User = types.User.get_current()
         locale: Locale = user.locale
 
-        if locale:
+        if locale and locale.language in self.locales:
             *_, data = args
             language = data['locale'] = locale.language
             return language
+        return self.default
 
     async def trigger(self, action, args):
         """