One of the great strengths of WordPress is its global reach. As a WordPress plugin, we too are fortunate to have users all over the world. Translations were an important part of 1.x, and we provided a number of languages packaged with the plugin. While originally a nice perk, this turned out to be not sustainable. The files quickly became outdated, and we ended up spending a lot of time accepting new files from users that may or may not have have been improvements on the older file.
We thought there must be a better way to help our users create translations, and fortunately there is. GlotPress is a project that allows people to collaboratively translate WordPress plugins. We are really excited to get it up and running on our site, and should have some news on this next week. In the meantime if you would like to learn more check out the instructions on how to use GlotPress for WordPress.com, or the translation of GlotPress itself.