Questions regarding the beta and demo versions.

You can use Russian – it’s built into the game, and you can simply enable it for the beta by adding it to the registry.

I tried, but it didn’t work. Maybe you could provide a screenshot of what it looks like (I mean, the registry)?

And you need to patch it using the Ubisoft launcher, so you shouldn’t even be able to download the patch.

I tried using gu.exe, but it says:
"Can't apply patch because Might & Magic Heroes VI is not yet installed."
That’s all.