Speak read and write the English language
Ahem... You've never seen a cabbie whose response on "take me to Rockaways" is a dumbfounded look. That's when you open up a dictionary and say, "Mujhe Rockaway Beach aura Amstel le chahiyeh" which is met with a loud praise that you can speak Hindi very well.
LMAO I would think RUSSIAN would be the very first language the proxy would support... if not written in.
"The fundamental principle of science, the definition almost, is this: the sole test of the validity of any idea is experiment." -- Richard P. Feynman