Problem: The client is unable to add products to the cart on a multilingual site when the products are in a language other than Italian, despite having enabled 'Language filtering for AJAX operations' in WPML → Languages. Solution: We discovered that adding products directly from the product page works, but not from the product category page. Additionally, the homepage was not translated into other languages, which could be related to the issue. We recommended translating the homepage into all required languages and then clearing the site's cache to ensure the changes take effect.
If this solution does not resolve your issue, or if it seems outdated or irrelevant to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. Should you need further assistance, please do not hesitate to open a new support ticket at WPML support forum.
