I’m wondering if there has been any movement or fixes in this in later versions of ACF or since this post was made. I think we run into a problem because the acf/get_posts_args isn’t passing a lang argument which is causing issues with relational posts. We can’t choose the posts we want to see in the post picker (like just that language or all languages) so we had to do some weird things with this (like overwriting the basic acf_get_posts function).
If we could send it a basic lang=” (for all) or lang=whatever, we wouldn’t have to be forking ACF and could make it work better.
I think I read somewhere that this is somewhat by design, to lock in the language, so you can only see related posts in the same language when you are using polylang. But we end up with CPTs for things like associated resources that might be used for posts in other languages.
