This thread is resolved. Here is a description of the problem and solution.
Problem:
You need to export categories to an XLIFF file for translation, including extra fields added with the ACF Pro plugin, but this functionality is not available directly through WPML.
Solution:
We recommend assigning all taxonomies to one product and then translating them. This method allows the categories and their additional fields to be included in the XLIFF file for the product translation. For detailed steps on how to translate all taxonomy terms at once, please visit https://wpml.org/faq/how-to-translate-all-taxonomy-terms-at-once/.
Ensure you are using our ACFML addon and follow the guide provided at https://wpml.org/documentation/related-projects/translate-sites-built-with-acf/ for integrating ACF Pro fields with WPML.
If this solution does not apply to your situation, or if it seems outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have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 further assistance is needed, please open a new support ticket at WPML support forum.
This is the technical support forum for WPML - the multilingual WordPress plugin.
Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.