Changing the product permalink

Somehow after testing WPML (I decided not to use this plugin) my links to the product look like this: https://www.mypage.com/toode/product-name
But the permalink looks like this: https://www.mypage.com/product/product-name

So all the links to the products lead to a 404 error. How could I change the permalink from “product” to “toode”?