Update i18n.py (#117)

i18n.py

@@ -11,10 +11,8 @@ def load_language_list(language):
 
 class I18nAuto:
     def __init__(self, language=None):
-        if language is None:
-            language = "auto"
-        if language == "auto":
-            language = locale.getdefaultlocale()[0]
+        if language in ['auto', None]:
+            language = locale.getlocale()[0]
         if not os.path.exists(f"./i18n/{language}.json"):
             language = "en_US"
         self.language = language