Support Russian language

[Zav39]

[daaain]

This is really cool, thanks a lot!

But it made me think that maybe this would be a good opportunity to look at supporting all languages (ie English letters + the full Unicode range), so something along the lines of this Stackoverflow answer: http://stackoverflow.com/a/35743562/21217

Would you be up for giving this a try? There's a good set of test strings on the same thread: 'Düsseldorf, Köln, Москва, 北京市, إسرائيل !@#$'