It took a long time, but finally the German language module for Pgmarket 2.0.1, a web shop by Marco Pratesi, is ready for download.
You can find the download by clicking on “Downloads” in the left navigation or by clicking here.
Installation of the module should be very easy: Just extract the contents of the archive into your Pgmarket 2.0.1 distribution directory (tar -xzvf pgmarket-2.0.1-de.tar.gz).
Set a symbolic link from application-de.inc.php to application.inc.php (ln -s application-de.inc.php application.inc.php).
The rest of the setup should now work as described in the original Pgmarket documentation.