locale problem

I have a problem with the locale in my client session. I have set the
locale on my remote client and on the server to "de_DE.UTF-8". This
also works well in OpenNX sessions but with X2goclient I see within the
client session nothing translated into German due to the locale not
applied well. Within the remote client session in any terminal I get
this:

[andyrtr <at> workstation64 ~]$ locale
LANG=
LC_CTYPE="POSIX"
LC_NUMERIC="POSIX"
LC_TIME="POSIX"
LC_COLLATE="POSIX"
LC_MONETARY="POSIX"
LC_MESSAGES="POSIX"
LC_PAPER="POSIX"
LC_NAME="POSIX"
LC_ADDRESS="POSIX"
LC_TELEPHONE="POSIX"
LC_MEASUREMENT="POSIX"
LC_IDENTIFICATION="POSIX"
LC_ALL=

Any idea?

More people seem affected in Arch by this:
https://bbs.archlinux.org/viewtopic.php?id=151160

Note: the x2go-qt client itself is properly working and translated on
the client.

-Andy
ArchLinux