hub switch it was to German.
Next i did default restore and setup it again with different account. On the beginning there was English language. But next day in the morning screen language is back to German again.
All commands by google assistant are spoken in English.
Unfortunately t@RxShorty solution did not work after casting some information by phone, language changed but part of it only. Now some some information are in English, and some in German.
So still case not solved