Hey!
I just did the same for an website I am made.
There are two solutions:
1/ Option
Instead of placing your fileds in the HP, you should creat an option page:
https://www.advancedcustomfields.com/resources/options-page/
That works just fine 🙂
2/ Dynamic #ID based on your language
Place this up the page in your php code :
<?php $pageID = icl_object_id(329, 'page', false); ?>
Change 329 by tyour HP’s ID.
Then, to call the field use this:
<?php the_field('MY_FIELD_NAME_HERE', $pageID); ?>
Even if the second solution works fine, the 1st one is more convenient for the BackEnd user 🙂
