Genesis Comments Form

functions.php

add_filter( 'genesis_comment_form_args', 'child_comment_form' );
/**
 * Change "Post Comment" button text.
 * 
 * @author Greg Rickaby
 * @since 1.0.0
 */
function child_comment_form($args) {
    $args = array (
	'label_submit' => __( 'Submit', 'genesis' ),
     );
    return $args;
}

function child_comment_form($args) {
    $args['label_submit'] => 'submit';
    return $args;
}

This worked. Thank you.

add_filter( 'genesis_comment_form_args', 'child_comment_form' );
/**
 * Change "Leave Comment" text.
 * 
 * @author Greg Rickaby
 * @since 1.0.0
 */
function child_comment_form($args) {
    $args['label_submit'] = 'Submit';
    return $args;
}