App::I18N::Command::Update - update mo files
if you use mo file , you might need to update mo file.
$ po update --locale
eg:
-project (master) % po update --mo --podir locale Updating locale/zh_TW/LC_MESSAGES/project.po Updating locale/zh_TW/LC_MESSAGES/project.mo 9 translated messages, 53 untranslated messages.