To add a new translation file (i.e. one that doesn't already exist):
 - copy the new language file to translations/<new_lang>.po
 - make targets=msgadd lang=<new_lang> (this sorts and formats the file)
 - cvs add and commit the file

To merge some newly translated strings into an existing translation:
 - copy the new strings file into the lwp_si_packages directory
 - make targets=msgmerge lang=<lang> newstrings=<new strings file>
 - cvs commit the translations/<lang>.po file

To generate a file of untranslated strings (so it can be sent to translators):
 - "cd lwp_si_packages && make targets=translations/untranslated_msgs.<lang>.po"
 - send the file lwp_si_packages/build/translations/untranslated_msgs.<lang>.po
   to the translator
