Thank you for bringing to our attention the issue with the User Fields not being translatable from the Paid Memberships Pro plugin. We have also noticed this problem and would like to address it promptly.
To resolve this matter, we kindly request that you contact the plugin author and invite them to join our Go-Global Program. By doing so, they can make their plugin fully compatible with our WPML plugin, and we would be more than happy to assist them in this process.