this is my first bugreport, so i'm already sorry for ev everything.
For the german version, it wants to download nwngerman129.tar.gz from fileplanet.com, where you have to pay/register. Therefore it fails.
Same problem for nwnresources129.tar.gz.
Solution: Just use the links from bioware ( to be found here: http://nwn.bioware.com/downloads/linuxclient.html ).
The German downloads are only available from FilePlanet, and you can get them with a free account. The nwresources file should be available form the mirrors listed in the ebuild.