Problem: The client is experiencing an issue with WooCommerce and WPML where, after switching languages, the cart retains the original product and variation IDs from the previous language. This problem is evident in the
woocommerce_before_calculate_totals
hook, where the product_id and variation_id still refer to the previous language versions, and a hard refresh is required to get the correct translated IDs. Solution: We apologize that the provided code did not resolve the issue. Unfortunately, the Buy One Get One Free for WooCommerce plugin is not known to us, and we do not have records of other users using it, which limits our ability to support this plugin directly. We recommend contacting the authors of the Buy One Get One Free for WooCommerce plugin for assistance with this issue. Alternatively, consider using a similar plugin that is officially compatible with WooCommerce Multilingual & Multicurrency, such as the WooCommerce Discount Manager plugin, or search for another compatible plugin at this link.
If this solution is irrelevant due to being outdated or not applicable to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent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. If the issue persists, please open a new support ticket.
