def set_label(self, label, lang='en'):
        """
        Set the label for a WD item in a certain language
        :param label: The description of the item in a certain language
        :type label: str
        :param lang: The language a label should be set for.
        :type lang: str
        :return: None
        """
        if self.fast_run and not self.require_write:
            self.require_write = self.fast_run_container.check_language_data(qid=self.wd_item_id,
                                                                             lang_data=[label], lang=lang,
                                                                             lang_data_type='label')
            if self.require_write:
                self.init_data_load()
            else:
                return

        if 'labels' not in self.wd_json_representation:
            self.wd_json_representation['labels'] = {}
        self.wd_json_representation['labels'][lang] = {
            'language': lang,
            'value': label
        }
Set the label for a WD item in a certain language
        :param label: The description of the item in a certain language
        :type label: str
        :param lang: The language a label should be set for.
        :type lang: str
        :return: None