In 50 years, situation will not change a lot regarding the languages, language is the
culture of each country, and they will not want lose it, who will want lose their native language, it will be like lose once of your mains customs, but, even so, with passing of the time the English, obiusly, will be globalize arround the world.
It is very useful to be able to understand everyone wherever you go, it will be a great
advance doubtlessly, but it is something that is to far, the old generations dont want to learn
idioms while the most of youngs see it like a waste time.
To reach this target we need a mentality change and a lot of time.
Image by: http://www.millenniumcenter.org/proiect/meetings-with-languages/5?meniu=despre