Is any way to get legal linux version when I bought localized windows version from 1C-Games(windows only)?
Localized resources from 1C-Demo work fine in Linux-Demo.
I don't think so. If you bought it from a vendor that only sells the Windows version then you only get the Windows version. Just like if you buy from Steam you only get the Windows/Mac versions.
If you bought it off of the frictional store you get the game for every OS. Maybe if you send a nice email to frictional support they might be having a good day and send you a link to the download only. I would think the game key is shared between OSs.
There were some rumors about adding linux and mac binaries to DVD, but I've bought the game today and there were none )=