Hi,
Note that this doesn't happen with all the products on your website.
I do see the problem when I try to change the language for
pureco.be/product/pureco-premiumpakket
But for
pureco.be/product/testpakket-pureco
it works just fine.
And the difference I can see is that for the first product, the alias changes when changing the language, but for the second one, the alias doesn't change.
And in the 4.6.0, we've added a new setting "Support translated aliases in URLs" under the Language tab of the HikaShop configuration:
We've added an extra setting "Support translated aliases in URLs" to the Languages tab of the HikaShop configuration so that you can manually activate the translation of aliases as it could cause heavy load on servers due to the way it works.
That setting is turned off by default as turning it on can create crashes when updating HikaShop if you have many products in the shop.
Plus, alias translation capability was only added recently to HikaShop so we thought not many people would be affected with that setting turned off by default.
You're one of the affected persons.
Turn on that setting, and it should work fine again.