Let me join the debate in favor of each keeping the language currently in use. Each writer, even English writers, use different vocabulary to express the unique personal view of the universe. How can we then conceive that the universe can be described in one language only. The native Canadian people of the North have some forty different words for what we call "snow". Each language has the power to describe life in a particular environment and the globe is environmental varied. English alone will never do to describe it all. Perhaps in the sterile field of commerce and business English, like Latin in its days, may become the 'lingua franca' (just to make the point) but for the rest of human communications, to each his/her own language.