I just saw this error in 12.04. It can be repeated by running sudo locale-gen, which gives the following output:
Generating locales... da_DK.UTF-8... done en_AG.UTF-8... done en_AU.UTF-8... done en_BW.UTF-8... done en_CA.UTF-8... done en_DK.UTF-8... done en_GB.UTF-8... done en_HK.UTF-8... done en_IE.UTF-8... done en_IN.UTF-8... done en_NG.UTF-8... done en_NZ.UTF-8... done en_PH.UTF-8... done en_SG.UTF-8... done en_US.UTF-8... done en_ZA.UTF-8... done en_ZM.UTF-8... done en_ZW.UTF-8... done eo_US.UTF-8... LC_ADDRESS: terminology language code `eo' not defined failed eo.UTF-8... done sv_FI.UTF-8... up-to-date sv_SE.UTF-8... up-to-date Generation complete. $ lsb_release -rd Description: Ubuntu 12.04 LTS Release: 12.04 $ apt-cache policy language-pack-eo-base language-pack-eo-base: Instalita: 1:12.04+20120417 Kandidata: 1:12.04+20120417 Version table: *** 1:12.04+20120417 0 500 http://dk.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages 100 /var/lib/dpkg/status -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/289879 Title: LC_ADDRESS: terminology language code `eo' not defined To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/language-pack-eo-base/+bug/289879/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs