If you’re interested in Moodle language packs you should keep up with http://download.moodle.org/langpack/2.3/ which highlights each of Moodle’s language packs and their progress. Over 20 language packs are over 80% developed and available.
Moodle has a total of over 100 language packs in various states of development (which I think is very cool). What’s more is that there are 100s of translators all contributing to the progress, http://docs.moodle.org/22/en/Translation_credits.
Did I mention that Pirate is available?