[Решено] ACF fields not showing in second language

It's about the site simmelink.nl
I'm using ACF fields to display text the hero part of pages. E.g. H1 and a few ULs. On pages in the primary language Dutch, the text is shown. But not in the secondary lanuage English.

Solution: The client was not using ACF Multilingual. https://wpml.org/documentation/related-projects/translate-sites-built-with-acf/