It would be boring. :P And italki would be out of business. :P Actually, Esperanto was an attempt to create an official common world language. Although the intention was purely humanistic and altruistic, it failed for numerous reasons. If you want to read more about it: http://en.wikipedia.org/wiki/Esperanto

I think it'll be the English language. Actually I think it'll be ever uninteresting. I suppose it's quite interesting to talk with foreigners.

Well, there won't be, so don't worry about it.

Well, aacording to the book of apocalipse. The Babylon tower curse wil be over. And all shall speak one language ;).

i will sleep the whole day to miss it i 'm interested in languages and how each and every language is unique and beautiful