I use Hyper-v Manager 10.0.19041.1. Host: Win10 Pro 21H2, Guest: Win10 Pro 21H2.
I added a few languages, but when I click alt+shift to change the language it doesn't work. It does work on the host though.
What can be the problem?
It seems that this is a bug. I was able to solve this by just deleting all languages and add them again.