Hi @screenpartner
Have you followed the guide on this page: https://www.advancedcustomfields.com/resources/multilingual-custom-fields/?
If you have, could you please open a new ticket and provide temporary admin credentials to your site? You can open a new ticket here: https://support.advancedcustomfields.com/new-ticket. Also, please don’t forget to explain the issue again and provide the link to this thread.
Thanks 🙂