Things have been changing dramatically for the last a few hundred years because of the industrial revolution and the information revolution. Especially the information revolution, a.k.a. The Internet. It has created a global human communication. Now you can contact with virtually anyone on this planet instantly. For example, Facebook has more than two billion monthly active users world wide.
The question is "how do we communicate with people with different languages?" The answer is One Language. I know there are many people who hate the idea. Or not many people bother communicating with people with different language. Or some people refuse to use different language other than their own language.
Which world is better? A world where people communicate much effectively by using one language? Or, a world where people have difficulty to communicate smoothly because of using many different languages? Language is a construction by human being. Which means we can reconstruct it by design if you will. Don't you think?