iTunes 12.6.5.3

Google Translate: Something went wrong.

Do you mean that translating from Russian to English went wrong, or something else?

Goggle Translate: Переводчик Google: Вы имеете в виду, что перевод с русского на английский пошёл не так, или что-то ещё?

It did not work for my wife's iPhone 11 Pro Max. I had to upgrade her iTunes to 12.9.

что пошло не так

And did she lose the ability to manage apps on iTunes?

Yes. The last version for app management in iTunes was 12.6.5.3.