Add multiple product in one language

Hello,
For the first problem – the warning message – this was fixed in later versions if I recall this correctly.
I am not sure if I understand the other issue that you have – the product for me is only added once to the cart. Isn’t it that what it is supposed to happen there?
Perhaps you have some code that adds the product automatically to your cart? I can only guess what is going on before taking a look at the code.

If you wish, you can always open a ticket at our forum at wpml.org – so that a specialist supporter can take a closer look.

Thanks for your response. Your are right, this night I have updated all WPML plugin and now the warning message has disappeared.

But one problem remains. Could you just test one more thing: if you go here: https://www.helvetibox.ch/de/produkt/6-monatsgeschenk/ and you add the product to the basket, you will get instead the product called: 2-Monatsgeschenk.

But if I am logged in as admin, it works! It adds the right product.

Any ideas why? If no, I will open a ticket at WPML.

I think that your problem that you are experiencing is due to caching.
Can you please confirm that you are using caching? Mainly using object cache can create some issues.
Also if you have not added exceptions for the cart – this is why this could happen.
I tested what you say, and when I added the 6-monatsgeschenk product, I got 6-monatsgeschenk in the cart and not 2-monatsgeschenk. This makes me to beleive that you might have caching issue.

Yes I am using Wordfence Falcon Engine for caching.

I’ve just added caching exclusion for /product/ and the /cart/ and now it seems it works fine. Let’s see.

Thanks a lot for your help! Have a nice day!