Russian language pack for the pirated version.

Probably, patch 3.1 will be released soon. At least, it was announced last year. If it can be installed, the text should be fine. It's unlikely that the voice acting will be fixed. In the meantime, I can suggest downloading a mod that improves the text descriptions: http://heroes.ag.ru/heroes5/mods/ I'm not sure if it will work for a non-licensed version, as it is intended for the licensed version, but it's worth a try (IMO).