Code-Snippets-Functions/Execute a function on a child site/WooCommerce/display-cart-totals-text-specific-countries.txt

add_filter( 'woocommerce_cart_totals_order_total_html', 'custom_total_message_html', 10, 1 );
function custom_total_message_html( $value ) {
    if( in_array( WC()->customer->get_shipping_country(), array('US', 'CA') ) ) {
        $value .= '<small>' . __('My text.', 'woocommerce') . '</small>';
    }
    return $value;
}