@theBlackDragon: I really hope you are right.
I checked again, so now there is a file named english.xml, I was able to edit is, the best way was Notepad++. There may be another better editor, I just hope they won't change the way of storing texts.
Special letters are another open question, I'll test it in the final game next week.
Someone knows if Larian will overwrite this file in later patches or only edit it if needed?
I never made a localization fully alone, so I'm really really excited if this will work out.
However I have no idea how long this will take. ;-)
