What language to learn

[arguskos]

I wonder how many people on this board recognize those as Elvish...

I did.

I recommend Klingon, for the awesomeness factor. I also recommend a real language, such as French or Spanish, from your list and for the usability factor. I know if you lived here, in the States, it'd be Spanish, as Spanish is a rapidly growing language here, but in England, I imagine it's less useful.