docs: def update_model_languages(self, model_class, languages):
          """
          Update the TransModelLanguages model with the selected languages
  
          :param model_class:
          :param languages:
          :return:
          """
          # get the langs we have to add to the TransModelLanguage
          qs = TransLanguage.objects.filter(code__in=languages)
          new_langs = [lang for lang in qs]
          if not new_langs:
              return
          mod_lan, created = TransModelLanguage.objects.get_or_create(
              model='{} - {}'.format(model_class._meta.app_label, model_class._meta.model.__name__.lower()),
          )
  
          exist_langs_codes = [lang.code for lang in mod_lan.languages.all()]
          for lang in new_langs:
              if lang.code not in exist_langs_codes:
                  try:
                      mod_lan.languages.add(lang)
                  except IntegrityError:
                      pass