Tolk doesn't appear to support locale files with different names. For example, we have files like admin.en.yml and admin.fr.yml. rake tolk:import will strip both extensions and report an error like this:
Locale file /config/locales/admin.yml does not exists.
got that error too with Devise (Auth tool) locales files called that way
I still need to investigate this issue, find it here : tolk/tolk#5