code: def get_parler_languages_from_django_cms(cms_languages=None):
      
      valid_keys = ['code', 'fallbacks', 'hide_untranslated',
                    'redirect_on_fallback']
      if cms_languages:
          if sys.version_info < (3, 0, 0):
              int_types = (int, long)
          else:
              int_types = int
  
          parler_languages = copy.deepcopy(cms_languages)
          for site_id, site_config in cms_languages.items():
              if site_id and (
                      not isinstance(site_id, int_types) and
                      site_id != 'default'
              ):
                  del parler_languages[site_id]
                  continue
  
              if site_id == 'default':
                  for key, value in site_config.items():
                      if key not in valid_keys:
                          del parler_languages['default'][key]
              else:
                  for i, lang_config in enumerate(site_config):
                      for key, value in lang_config.items():
                          if key not in valid_keys:
                              del parler_languages[site_id][i][key]
          return parler_languages
      return None
docs: Converts django CMS' setting CMS_LANGUAGES into PARLER_LANGUAGES. Since
      CMS_LANGUAGES is a strict superset of PARLER_LANGUAGES, we do a bit of
      cleansing to remove irrelevant items.