>>>Yeah, I forgot about the "yo" but it's still not called an umlaut, is it?
>>>
>>No, there is no special name for this kind of letter in Russian.
>
>That's strange. In school I learned it as yoh or just yo.

I meant it's not called umlaut. Yes, it's called yo. Another letter is j (i kratkoe). I haven't read Russian books recently and I forgot for a moment if it's indicated in texts or not (I believe it does). Yo usually doesn't have double dots on it in books.