WooCommerce - Show terms slugs instead of names

<?php
// WooCommerce - In Product Data, Attributes tab
// show term slugs instead of term names
add_filter( 'woocommerce_product_attribute_term_name', 'custom_product_attribute_term_name', 10, 2 );
function custom_product_attribute_term_name( $term_name, $term ) {
  return $term->slug;
}