LANG=”nds_DE:nds:de_DE:de” LANGUAGE=”nds_DE:nds:de_DE:de”
(Leading whitespaces might confusing glibc, I dunno.)
I think you just want:
LANG="nds_DE.UTF-8" LANGUAGE="nds:de"
The locale envvars only take a single locale AFAIK unlike the gettext LANGUAGE environment variable which can take a colon separated list of languages.
Jens