It's called "English".
OK, fine, it's not exactly what you are driving at, but it is the world's second language... and I think that's what should happen. We should all agree on one second language to learn, so that we can preserve our own language and culture but still communicate with everyone else.
“It is a strange paradox that today’s central banks are generally staffed by economists, who by and large profess a belief in a theory which says that their jobs are, at the best, unnecessary, and more likely wealth-destroying. Needless to say, this is not a point widely discussed among respectable economists. Nevertheless, it is an issue worth pondering.”
George Cooper, The Origin of Economic Crises