Is it possible that in year 2050, all nations will speak one language?

Very unlikely... English is the common language in business and the tourism industry because it has to deal mostly with people from the english world. It is also the language used in programming for computers. This has a big impact on people using computers in non-english countries. Because of all this... young people will be encouraged to learn english more and more. But for english to become the universal language... it will take a lot longer than that. More like one hundred or two hundred years.

Its possible but I tend toward thinking it wont be that way. Like another poster, I'm wondering if the world or humanity will still be here to see 2050.

It would make life easier but I can't see some countries giving up their language, gee the 2050, I hope the world is still in good shape by then, I think the language thing is just small thing compared to other things we must overcome first. But we can hope, in fact we must hope.

I doubt that by 2050 all nations will speak English. For one thing, in the USA Spanish is coming into more and more usage. If the percentage of people speaking English is decreasing in the USA I doubt English will take over the world the way it once looked that it would.

I don´t think this is possible. But, maybe in 2050 i´ll speaking english better. hehehe.

I thik it is impossible.It is because many country and their citizens still loyal to their language.