OK, here is my report
I got both games working with official keys on my laptop. As I have only two time activation keys I can not afford to install this game to my prime computer at the moment. As a result the games play a bit choppy on my laptop at high settings.
First thing I tried Beltion. I was poking around configuration files in Beltion directory and to my surprise I was able to change a couple of strings to English and here you go...
There is actually an English demo build within the game itself. It looks like everything is in English except for the voiceovers which are still Russian. Also the demo starts in a different place than the complete game, in some sort of port city.
Here is the video from demo (frame rate is poor as I am running this on my not so good laptop)
http://tinypic.com/player.php?v=2z752xt&s=6
And now for the whole game. Another surprise. I changed a couple of strings in cfg file and the result is:
All options for in game settings are translated, intro has subtitles, the beginning of the game is in English, except for the quest logs.
Here is the video of playing complete Russian version with English language enabled through cfg changes (cannot load more than 5 minutes long video)
http://tinypic.com/player.php?v=2ryog05&s=6
As it seems the developer did quite a lot of work for international release and some things must prevent them to complete the translation (no publisher, no founds, no interest,... who knows). It is a pity since the game looks and plays like a decent Gothic clone.
Will report on Heart of Eternity later this month.