def pre_delete_title(instance, **kwargs):
    """ Update article.languages
    """
    if instance.article.languages:
        languages = instance.article.languages.split(',')
    else:
        languages = []
    if instance.language in languages:
        languages.remove(instance.language)
        instance.article.languages = ','.join(languages)
        instance.article._publisher_keep_state = True
        instance.article.save(no_signals=True)
