Gen 11:5 And the LORD came down to see the city and the tower, which the children of men builded.
11:6 And the LORD said, Behold, the people [is] one, and they have all one language; and this they begin to do: and now nothing will be restrained from them, which they have imagined to do.
11:7 Go to, let us go down, and there confound their language, that they may not understand one another's speech.
11:8 So the LORD scattered them abroad from thence upon the face of all the earth: and they left off to build the city.
11:9 Therefore is the name of it called Babel; because the LORD did there confound the language of all the earth: and from thence did the LORD scatter them abroad upon the face of all the earth.
So you see, children, multiple languages are the acts of a jealous, petty, vengeful, evil god (at least in the Judeo-Christian mythos). For languages to die out is to bring us one step closer to permanently rising up and slaying our celestial would-be master and truly claiming reality for our own.
Unite. Find a common tongue, whether it's English, Mandarin, Swahili, or whatever the world decides on (and it seems we're defaulting to English---even the Chinese in business speak it because it is the language of commerce and the lifeblood of global trade) and destroy the vengeful, evil god who would divide us against each other on linguistic lines.