add_filter( 'woocommerce_taxonomy_args_product_tag', 'ljp_wc_taxonomy_args_product_tag' );
function ljp_wc_taxonomy_args_product_tag( $args ) {
$args[ 'label' ] = ( 'Product Tags', 'woocommerce' );
$args[ 'labels' ] = array(
'name' => ( 'Brands', 'woocommerce' ),
'singular_name' => ( 'Brands', 'woocommerce' ),
'menu_name' => x( 'Brands', 'Admin menu name', 'woocommerce' ),
'search_items' => ( 'Search Product Brands', 'woocommerce' ),
'all_items' => ( 'All Product Brands', 'woocommerce' ),
'parent_item' => ( 'Parent Product Brand', 'woocommerce' ),
'parent_item_colon' => ( 'Parent Product Brand:', 'woocommerce' ),
'edit_item' => ( 'Edit Product Brand', 'woocommerce' ),
'update_item' => ( 'Update Product Brand', 'woocommerce' ),
'add_new_item' => ( 'Add New Product Brand', 'woocommerce' ),
'new_item_name' => _( 'New Product Brand Name', 'woocommerce' )
);
return $args;
}