This thread is resolved. Here is a description of the problem and solution.
Problem: The client is experiencing issues with brand translations in WooCommerce after setting the Brands taxonomy to 'Translatable'. Brands appear multiple times when adding a product, and translated brand pages show a 404 error. Solution: 1. Set the Brands taxonomy to 'Translatable' in WPML -> Settings -> Taxonomies Translation. 2. Navigate to Products → Brands and filter by language. Delete the translations of the Brands. 3. Set the Brands taxonomy back to 'Not Translatable'.
If you need to set Brands translatable, use a temporary workaround, add brand to the Product brand base in Settings → Permalinks and save the changes. This should improve the URL behavior temporarily for Brands until a complete fix is released in future updates of the WooCommerce Multilingual plugin.
Please remember to make a backup before making these changes. If this solution does not resolve your issue or seems outdated, we recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have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 further assistance is needed, please open a new support ticket at WPML support forum.
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I was able to replicate this behavior on a fresh installation and have already escalated it to our team for further review. I’ll update you here as soon as I receive any feedback or additional information.
I’ve received feedback from our team. As a temporary workaround, please try adding “brand” to the Product brand base in Settings → Permalinks and then save the changes (no need for further actions in WPML → String Translation as it is already translated there). This should help improve the behavior for now.
A complete fix is planned for future releases of the WooCommerce Multilingual plugin.
For now, it works. However, 'merk' remains 'merk' in all languages. For Dutch, that is no problem, but for English it should be 'brand', for German 'merke', etc. See #46.
Attachment #47 reflects the new situation under Settings -> Permalinks.
I’m glad to hear that everything is working well for you.
Regarding your other question, I recommend consulting the official WooCommerce documentation for the best guidance, as it pertains to a topic outside the scope of WPML functionality.