How to get another system language by default?

[Roger Grosswiler]

hi again,

coming after installing fc4t2 in text mode, where i could not install 
any language.

After the Systemupdate from today, it was impossible to select any 
language while login, not just for that one session.

Then, i tried to reinstall language-support, via gui - this did not work 
either, as this is not an option in package management.

So, how can i set my fc box to german - by default?

Roger