WordPress blocks English comments — only comments containing Chinese are permitted

CMS
1

Foreword

WordPress sites are frequently targeted by spam comments, which are usually generated in English and contain no Chinese characters. To effectively filter out spam comments, you can add a few lines of code to your theme’s template functions file (functions.php) to only allow comments containing Chinese characters to be submitted. This is a simple procedure that does not require installing any additional plugins.

2026082108535438
20260821085354381330×899 123 KB

Steps to Follow

  1. Open the Theme File Editor as shown in the image below, click on Template Functions, paste the code into the file, and finally click Update File.
// Only allow comments containing Chinese characters to be published
function block_non_chinese_comments($commentdata) {
    $comment_content = $commentdata['comment_content'];
 
    // Match Chinese characters using Unicode properties
    if (!preg_match("/\\p{Han}/u", $comment_content)) {
        // Terminate submission and display an error message if no Chinese characters are present
        wp_die('<p style=\"text-align:center;font-size:18px;margin-top:50px;\">Error: Comment content is illegal!</p>',
        'Error:',
        array('response' => 403)
        );
    }
    // Allow comment submission if Chinese characters are present
    return $commentdata;
}
add_filter('preprocess_comment', 'block_non_chinese_comments');

2026082109031756
20260821090317561444×831 163 KB

  1. Result after submitting a non-Chinese comment.

2026082109025773
20260821090257731064×706 22.3 KB

Original link: https://wp.bufanz.com/wordpress/only-comments-containing-chinese-are-permitted.html