code: def contribute_to_class(cls, main_cls, name):
          
  
          # delay the creation of the *Translation until the master model is
          # fully created
          signals.class_prepared.connect(cls.finish_multilingual_class,
                  sender=main_cls, weak=False)
  
          # connect the post_save signal on master class to a handler
          # that saves translations
          signals.post_save.connect(translation_save_translated_fields,
                  sender=main_cls)
docs: Handle the inner 'Translation' class.