How to change the 'Track' text of the button in My Account > Orders

You can change the 'Track' label by adding this custom code in the functions.php of your active theme:

if ( ! function_exists( 'yith_ywot_order_tracking_message_orders_my_account' ) ) {
    function yith_ywot_order_tracking_message_orders_my_account( $label ) {
        $label = 'New label here';

        return $label;
    }

    add_filter( 'yith_ywot_order_tracking_message_orders_my_account', 'yith_ywot_order_tracking_message_orders_my_account' );
}