StatusNet main development will be moving from 0.9.x to 1.0.x branch soon". A 1.0 release is the holy grail when software is considered feature complete.
At translatewiki.net, we have amassed a huge amount of StatusNet extensions and these 83 extensions contain together with the core StatusNet software 2319 messages. Surely at a time like this, when a release is in sight, it is a great moment to help out with the localisation.
The great thing of the StatusNet software for a localiser is that everything is in one place. It is just a matter of getting your teeth in and you are helping to make micro blogging software ready for your language. This software is great at connecting with other StatusNet servers and, you can even reach out to a Twitter.
A start with the localisation has been made for many languages; this is where you can check how your language is doing.