I have the same question. It is very easy to modify, edit or swap strings in the mdl files in "Dict" directory (I have a python script for that). But the GOG.com version don't read the mdl files in "Dict" directory. Try to rename or delete the "Dict" directory. The game starts normal and you can see english texts as always...
Where are the strings saved? In the exe file?
[This message has been edited by Harmoniker (edited 01-27-2014 @ 04:45 AM).]