Mines are fairly mainstream! - English and German. They are compulsory in my career, so I have no option. If I owned my whole free time, I would devote myself to the study the Irish, Russian, Chinese or Japanese languages the most, I guess. English is very useful, though - and I really enjoy it.

Regarding your other question, I think that the states of affairs will remain the same. There is no reason why they should change. Japanese and Korean languages will be still the most popular, I expect.

@seand645: the Basque language is not dying anymore, they are doing a great job for that. I live in the Basque Country, and I can tell you that it is reemerging. Most young people course their studies entirely in Euskera, so every year more and more people are able to speak it.

I'm currently learning Russian and Arabic. I'm also learning Spanish but I'm putting it on the side right now because it's the easiest among the 3 languages that I'm studying 

What less known language would attract language learners this year? Interesting question. Perhaps Polish or Czech? It really depends on people's preference(s)