How to copy comment.php from parent to child-theme?

Hey ezvisa,
To copy the comment.php to child theme and change it, please add this code to the end of your child theme functions.php file in Appearance > Editor:

function avia_include_shortcode_template($paths)
{
	$template_url = get_stylesheet_directory();
    	array_unshift($paths, $template_url.'/shortcodes/');

	return $paths;
}
add_filter('avia_load_shortcodes', 'avia_include_shortcode_template', 15, 1);

then create a folder “shortcodes” in your child theme directory and add your modified file there.

Another option is to add this code to the end of your functions.php file in Appearance > Editor to change the text, but you must have jQuery enabled and loading in the head within the performance settings:

function custom_comment_script(){
  ?>
  <script>
jQuery(window).load(function(){   
  // Replace coments title to "Let me know your thoughts, leave a comment.". 
  jQuery(".single-post .miniheading").text("Let me know your thoughts, leave a comment.");
  // Replace sub-heading to "Please tell us more". 
  jQuery(".single-post .minitext").text("Please tell us more");      
  // Replace submit button text to "Post your Thoughts".
  jQuery(".single-post .submit").val("Post your Thoughts");
});
 </script>
  <?php
  }
  add_action('wp_footer', 'custom_comment_script');

Best regards,
Mike