Seems to be fine now. Apparently it had been fixed with the updates of all language-pack-xx-base packages to version 1:14.04+20160720. I see gdebi.mo is included there now.
** Changed in: gdebi (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1288258 Title: GDebi isn't localized in Ubuntu 14.04: gdebi-core package is missing /usr/share/locale directory To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdebi/+bug/1288258/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs