English is forever going to be the main language of the world
meta.maxkle.in
meta.maxkle.in
Momentum, time investment etc once belonged to Latin, French, Greek and other languages in the past. English will be replaced eventually by Chinese, Spanish, or some future language that may itself descend from English or a mixture of current languages.
"Forever" ? Please. Read some history.
I do expect language to become obsolete, i.e. showing someone an illustration of something instead of describing it to them. English might be the last language in use, but its vocabulary is only going to decrease.
While English has a simple script and basic grammar, the spelling is horribly inconsistent, probably worse than any other widely spoken language. I suspect that the influx of people using it as a second language will eventually wear down the resistence from horrified language conservationists.
An interesting point.