Solved !
Let's go:
# Go to the console
sudo dpkg-reconfigure keyboard-configuration
# select generic PC-Tastatur 105 Tasten
# ... -> Deutsch ... -> Deutsch
# Editing the ~/.profile
nano ~/.profile
# go to the end of file and edit the lines like this:
export LANG="de_DE.UTF-8"
export LANGUAGE="de_DE:de"
export LC_MESSAGES="de_DE.UTF-8"
export LC_CTYPE="de_DE.UTF-8"
export LC_COLLATE="de_DE.UTF-8"
# Go to console
sudo locale-gen de_DE@euro
setxkbmap -model pc105 -layout de -variant basic
And now nearly all incl. the keyboard-layout is in german
This helped me:
http://wiki.ubuntuusers.de/spracheinstellungen
Perhaps it works with other languages/regions, too
EDIT:
to get Ubuntu 11.04 in german:
sudo apt-get install language-pack-gnome-de language-pack-gnome-de-base
-> Systemsettings -> Region -> German(y) -> apply systemwide
Set the Timezone: Click on the time -> set the timezone to Berlin -> Get time from internet
Greets, Tommes