Copy Paste from the link: http://darkmatters.org/forums/index.php?/topic/17091-guide-change-fonts-used-in-games-interface/
"Why would I do this?
Shopping: pick a font that makes item properties easier to read.
Image Quality: a bolder, sans-serif font may look better to some people.
Non-native resolution: lower the res., increase graphic settings, and still have readable text!
How to Find the File
To change the fonts, we need to find a particular .xml file.
Find your Sacred 2 game folder.
Look in it for the locale subfolder.
Then go into the next subfolder.
(On my install it's F:\Games\Sacred 2\locale\en_UK.)
In the folder there is a ListFontGroups.xml file. Backup this file now, if you wish."
Font #1 is for captions, large buttons, etc.
Font #2 is for basically everything else: items, stats, whatever.
Change the font name to whatever you like and the file to name-of-font-file.ttf
The game can see and use any font file in C:\Windows\Fonts."
I hope that is usefull