Cannot change comment text

You need to create a child theme. (It’s in the Codex. It’s easy.)

Then add this to your child theme’s functions.php file:

add_filter('comment_form_defaults','comment_reform');
function comment_reform ($arg) {
$arg['title_reply'] = __('Please leave a comment');
return $arg;
}

Change “Please leave a comment” to whatever message you would like.

The easiest way to create a child theme is by FTP, if you are comfortable using an FTP client:

https://codex.wordpress.org/Child_Themes

If you aren’t, or you don’t have FTP access, there are plugins that will create child themes for you:

https://wordpress.org/plugins/search.php?q=child+theme

I haven’t used any of these. I usually do it via FTP.

Nancy,

I concur on needing a child theme because you have to use custom PHP to change the default WordPress message. I do have a starter child theme available on GitHub for UU2014:
https://github.com/dflippo/uu2014-child

Adding the code above to the functions.php in the child theme should make the change you are looking for.