Hi, Janneke-Incosi , I think I misunderstood what is your problem and if you're talking about the ATUM Stock Central or the WooCommerce Product's List.
As I said to you in the previous post, we show only products in the currently selected language in ATUM Stock Central, so then, the counters that appear there, only include those products.
If you're talking about the WooCommerce Product's List, we never change that list. The only thing that ATUM adds there is some information in some columns (like the variations stock in the stock column), so if some of your products have disappeared from there, it's pretty sure it's not due to ATUM.
Anyway, if you're sure ATUM has caused some of your products to disappear from the products list, it would be a good idea to open a support ticket here and allow us trying to find out what's going on with your site.
About the WPML, thanks, that was the question.