Problem: The client reported an issue where ACF repeater and flexible content fields were not displaying on translated pages in secondary languages if the ACF Field Group is registered programmatically.
Solution: We acknowledged the issue and informed the client that our developers are working on a fix for a future update of Advanced Custom Fields Multilingual. Meanwhile, we provided two workarounds: 1. Navigate to WPML > Settings > Custom Field Translation and click on Show system fields. Search for the repeater fields that begin with an underscore (_) and set those fields to copy. 2. Alternatively, use the JSON feature of ACF instead of PHP for defining the fields. More information on this can be found at ACF Local JSON documentation.
Please note that the solution provided might be outdated or not applicable to your case. If the issue persists, we highly recommend checking the related known issues, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If you still need assistance, please open a new support ticket in the WPML support forum.
