The latest German files from mid-last week are integrated into this build. There maybe some small data differences or additional #-defined extra text strings that are not present, but those can be added in the future.
If Language = German at HKEY_LOCAL_MACHINE\SOFTWARE\Stardock\Drengin.net\GalCiv2, then the updated German files will install. If that has been changed to English via a previous update installer or beta, you'll need to use RegEdit.exe to flip it back. Or reinstall from the retail CD over the top of the existing one and then apply the update, but that seems to be overkill to update 1 registry key.
There are many great features available to you once you register, including:
Sign in or Create Account