How to change the default button "add comment" in Wordpress?

How to change the default button "add comment" in Wordpress ?
The theme of the website entirely from scratch . Comments added <?php comments_template(); ?>. Functions added:
wpb_preprocess_comment function($comment) {
 if ( strlen( $comment['comment_content'] ) > 5000 ) {
 wp_die('the Comment is too long. Please keep your comment under 5000 characters.');
}
if ( strlen( $comment['comment_content'] ) < 10 ) {
 wp_die('the Comment is too short. Please use at least 60 characters.');
}
 return $comment;}
July 12th 19 at 17:31
1 answer
July 12th 19 at 17:33
Have you tried not "from scratch" to write, and to use a "blank" theme-type underscores.me . Immediately such questions will disappear.

Find more questions by tags WordPress