Does a MIUI-Phone work in Europe?
According to GSMArena, the Xiaomi Mi-Two supports the following frequencies:

2G Network: GSM 850 / 900 / 1800 / 1900

3G Network: HSDPA 850 / 1900 / 2100

You can check what frequencies your country uses here. It should work in most if not all EU countries though. 

Also, it supports Chinese and English officially but there is unofficial support for other languages, located here.