Why do you guys want to learn those languages? My reasons are:
German - Germany is an industrious country and very influential country in terms of politics, so learning their language could help me in the future. Plus, I want to watch Germanic films
Russian - I want to visit Russia if ever I could, sounds fun
Mandarin - Business, the Chinese market is huge
French - My sister learned this language for her foreign language class, so I want to learn it too, just so we can talk and people won't understand.
Spanish - Lots of people speak Spanish, so thats why.
Italian - Well my reason here is very profound, it's because of Ezio.