So I thought to make things even easier to post the files here: Simply extract the .rar into your game folder, where the SpellForce.exe is.
Then open the game and if it works, you should have game VA and english text.
If you want to change the text language, open the langid.lua file with notepad++ and change the number 1
The list is:
0 - German
1 - English
2 - French
3 - Spanish
4 - Italian
Enjoy.
