Problem: The client reported that GTINs and MPNs stopped appearing in the translated XML feeds of their WooCommerce Google Product Feed after a few weeks, potentially due to an update. This issue was only occurring with products that have multiple attributes as variations. Solution: We confirmed that the WooCommerce Google Product Feed plugin is officially compatible with WPML, as detailed on our compatibility page: https://wpml.org/plugin/woocommerce-google-product-feed/. The client decided to manually input all GTINs and MPNs into the relevant fields to resolve the issue, indicating that the plugin might not update these fields instantly.
If this solution does not apply to your situation, or if it seems outdated, we recommend opening a new support ticket. Additionally, please check related known issues at https://wpml.org/known-issues/, verify the version of the permanent fix, and confirm that you have installed the latest versions of themes and plugins. For further assistance, you can also visit our support forum: WPML Support Forum.