I had the same problem, but my root account has only:
LANG="en_US.UTF-8" LANGUAGE="en_US:en_GB:en" LC_CTYPE="de_DE.UTF8" LC_TIME="de_DE.UTF8"
setting LC_ALL=C and re-runing "dpkg --configure -a" solved my problem.
I had the same problem, but my root account has only:
LANG="en_US.UTF-8" "en_US: en_GB:en" "de_DE. UTF8" "de_DE. UTF8"
LANGUAGE=
LC_CTYPE=
LC_TIME=
setting LC_ALL=C and re-runing "dpkg --configure -a" solved my problem.