Copy ACF post object in the right language

Hello everyone,

i have quite a tricky problem, i want a chosen ACF ‘post object’ from a custom post type to be synchronized in the right language with the translated post. As for now, if i choose an ACF post object, in the translation of this post, the post object from the original post language is choosen but not the one in the target translation.

Is there any way to do this without Polylang / ACF Pro? With other fields like custom taxonomies it is working!

Thanks in advance!