Hey, already leave a message about it but not on the right place.
If the option exceptions are still present on 4.12.2, it means that they will be kept, right?
When a product has options with exceptions, a bug occurs on the frontstore. When the customer is not on the basic language of the shop, the system changes the language of the options and the add to cart button when an option is chosen.
Any idea where this might come from?
You can see this there:
https://www.magasindepeinture.ch/en/a0.03.78-en.html
Have a great day.