docs: def lang_direction(request):
      """
      Sets lang_direction context variable to whether the language is RTL or LTR
      """
      if lang_direction.rtl_langs is None:
          lang_direction.rtl_langs = getattr(settings, "RTL_LANGUAGES", set())
  
      return {"lang_direction": "rtl" if request.LANGUAGE_CODE in lang_direction.rtl_langs else "ltr"}