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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def order_by(self, *field_names):
 """ Change translatable field names in an ``order_by`` argument to translation fields for the current language. """

        if not self._rewrite:
            return super(MultilingualQuerySet, self).order_by(*field_names)
        new_args = []
        for key in field_names:
            new_args.append(rewrite_order_lookup_key(self.model, key))
        return super(MultilingualQuerySet, self).order_by(*new_args)