[Zerif] How to change the "Leave a Reply" text

First, please make sure that you're  using a child theme with your Zerif theme.

Edit the  functions.php file of your child theme with the following code:

function zerif_child_theme_filter_comments($args) {
	
	$args['reply_text'] = 'New reply text';
	$args['reply_to_text'] = 'New reply text %s';
	
	return $args;
}

add_filter('comment_reply_link_args','zerif_child_theme_filter_comments');

Where you need to replace the "New reply text" string with the one you want.

This code can also be used, with little adjustments to customize all the options of the comments form, like the order of the comments or the avatar size.

Don't forget to save your changes. And if you need any help then please post a new thread  at our forums. :)