Change Comment Number

/* Change Comment Number */
function change_comment_number( $comments_number, $post_id ) {
    if ( '0' === $comments_number ) {
        $comments_number = 'Let’s Discuss!';
    }
    return $comments_number;
}
add_filter( 'jnews_get_comments_number', 'change_comment_number', null, 2 );