Hi @fthues
ACF works well with WPML, but I’m not sure about Polylang. This page should give you more idea about it: http://www.advancedcustomfields.com/resources/multilingual-custom-fields/.
You can also specify the id of the original post like this:
$field = get_field('field_name', 99);
Where ’99’ is the id that has the custom fields.
I hope this helps.
