Translate Header Text over Background Video/ PolyLang

we successfully added a header text to the background video on front page using this tut: Adding text on video header

Now we would like to translate the header. We tried to adopt this Polylang for call-to-action button link without success.

Any help appreciated.
Thank you
http s://www. g e t i tb a c k . pl/ web / in dex.php /en/

The topic looks like a duplicate of this one, so I close it.