Thanks for Tobias, a very kind user of PHPMembers, the German Language Pack is available for download now. The language pack contains the language files for the main system, system emails and the username plug-in. If you are wondering how to install the language pack, please see Adding The Language to The System Configuration File section.

Here is the download link of the German Language Pack: http://www.phpmembers.com/files/language-packs/german-language-pack.zip