A report fromÂ Matt Sanford, the lead engineer for Twitter’s international team:
Today we are a global information network, with a robust developer ecosystem and a website available in six languages. Our users on Twitter are even more geographically diverse — we’re proud to report that over 60% of registered Twitter accounts come from outside the US. There are Twitter users in the large countries you’d expect, some smaller countries you might not expect (like the Vatican City) and even one in outer space.
Read more at the official Twitter blog.