We face some problems with some products in our store.
We’ve several products with the button: IN WINKELMAND
And several products with the button: ADD TO CART
As we can see, this text is added by some extra plugin installed on your website https://prnt.sc/hmw41k
We checked its PO file and this text seems to be translated but it still not working. So it is a plugin bug so you need to contact their developers for help. You can also check how it works with default WordPress theme to be sure that it is not our theme issue.