Today, almost any job position requires the knowledge of at least on of these three languages - Englsih, Spanish, German. The employer will always appreciate this worker.
According to specialists' estimation, in 50 years the Chinese language might become an international one, even though it's absolutely sophisticated. Chinese has already begun to be popular in many foreign languages centers. English is the most popular of course, but it's being studies just because it's the first language of the world.
It is supposed, that English, Spanish and Arabian will become the most useful languages. Why Spanish? Well it could be related to the financial crisis. The deeper it goes, the more specialists Europe will require, and of course Europe's population size increasing is expected to happen due to Latin Americans.
The situation of languages in the future will be determined by the further unleashing of economic, political, social things.
Here are the results of a probe in the matter of language importance:
15% consider Chinese to be the future language
28% take English as the present most important langauge
57% believe it's necessary to know first of all your own language