I use a custom shipping plugin for my WooCommerce called Table Rate. When the cart's total is more than X $, the shipping cost is set to 0.
In the cart page, when there is a shipping cost, it currently displays, for example "Postal delivery: $6,00" in the shipping method section. When the shipping is free, it displays "Postal delivery".
I would like that when the shipping is 0, it adds the text "(Free)" after "Postal delivery" in the cart and checkout page, but I can't find out where this is managed in WooCommerce. I have checked the different template files, but get stuck there. I guess it could be done with a hook in the functions.php file but I'm quite inexperienced with this.
Thank you very much.