The importance of this question can not be overemphasized.

I know the Bretons are the easy money, but let's see what you people can cook up.

Cyrodiil would. They already have Flin, which sounds like whiskey without the hangover.

They all would*. Although I expect the Nords would have discovered that you can freeze the excess water out of mead, ale, cider or whatever, and have something similar, but different.

*Except maybe the Argonians. Their immunity to poison might make it impossible for them to appreciate whiskey.

In Morrowind, Flin is referred to in its ID as "Cyro_whiskey", so I guess the Imperials already created it.

I see.