WordPress屏蔽指定外文垃圾评论

//评论过滤
function refused_spam_comments( $comment_data ) {
    $pattern = '/[一-龥]/u';
    $jpattern ='/[ぁ-ん]+|[ァ-ヴ]+/u';
    if(!preg_match($pattern,$comment_data['comment_content'])) {
        err('写点汉字吧，博主外语很捉急！You should type some Chinese word!');
    }
    if(preg_match($jpattern, $comment_data['comment_content'])) {
        err('日文滚粗！Japanese Get out！日本語出て行け！ You should type some Chinese word！');
    }
    return( $comment_data );
}
add_filter('preprocess_comment','refused_spam_comments');