Hi there,
Thanks for writing in! To add the google font which is not in the X theme, you can add the following code in your Child Theme’s functions.php
add_action('wp_head','custom_font');
function custom_font() {
?>
<link href="http://fonts.googleapis.com/css?family=Pacifico" rel="stylesheet" type="text/css">
<?php
}
Just replace Pacifico with your google font name in the above link. Let us know how this goes!