Frontend, only top menu localized

After upgrading from 2.1.3 to 2.2.2, my frontend is not localized anymore. only the top menu (settings, tools,…) is. The system itself is set to ‘de_DE’ and the locales are generated. it is a debian 4.0 box. Any trick I missed?

[code:1]
asterisk1:~# locale
LANG=de_DE
LANGUAGE=de_DE:de:en_GB:en
LC_CTYPE="de_DE"
LC_NUMERIC="de_DE"
LC_TIME="de_DE"
LC_COLLATE="de_DE"
LC_MONETARY="de_DE"
LC_MESSAGES="de_DE"
LC_PAPER="de_DE"
LC_NAME="de_DE"
LC_ADDRESS="de_DE"
LC_TELEPHONE="de_DE"
LC_MEASUREMENT="de_DE"
LC_IDENTIFICATION="de_DE"
LC_ALL=
[/code:1]