code: def get_language():
      
      lang = _get_language()
  
      if not lang:
          return get_fallback_language()
  
      langs = [l[0] for l in settings.SUPPORTED_LANGUAGES]
      if lang not in langs and "-" in lang:
          lang = lang.split("-")[0]
  
      if lang in langs:
          return lang
  
      return settings.DEFAULT_LANGUAGE
docs: Returns an active language code that is guaranteed to be in
      settings.SUPPORTED_LANGUAGES.