English become an international language due to its simplicity in use, and prevalence (as a result of British colonisation) in world. Also English got its popularity in USSR because of cold war period as a preparation to 3rd world war (guess with who)
, and Rock-n-Roll period (as a result of sex, drugs... :-) ) . According to Internet data currently on our planet is 1 500 000 000 English speaking people. As a result - English is most used language. That is why signs at all the exhibits, generally, has English translation only...
