OK, this one's probably easy - I think...

http://repository.maemo.org/extras/p...ing_1.0.tar.gz
is the source package.

It contains a ./po directory. Within this directory, you'll find:
en_GB.po
fi_FI.po
pl_PL.po

to start with.

Leave the other files alone. The package maintainer should adapt them if necessary. I'd take the English en_GB.po as a template, translate it (I speak german, so I'd save it as de_DE.po then) and ask the package maintainer if he wants it.