Comment 15 for bug 995054

2 Stefan Hammer:
Langpacks are for interface. Can you see langpack xpi files in 'extensions' directory? Are langpacks enabled in about:addons? Did you restart thunderbird? Maybe your environment variable (LANG) is not set correctly (for example you selected english in gdm screen). Try to run thunderbird with proper LANG variable from terminal, e.g:
# LANG=ru_RU.UTF-8 thunderbird