Hehe, yes, yay for fictional languages! At first I wanted to go for Dovahzul, but it's not really learnable as a language. Klingon is though, so Klingon it is!
I have a nice Sindarin dictionary at home, but I never used it. Elves are not my kind of people... Too peaceful, too quiet ;P (Now, if I had a chance to learn the dwarven language, I would go for it)
Uh, a bunch of the Tolkien elves were sort of maniacs who brought about things like civil wars and genocides and obliteration of kingdoms. Of course, all this happened way before LotR, so I guess all the non-peaceful elves got killed off. /geekery
can you tell I'm a Tolkien fan?Sindarin doesn't really have a complete grammar either, but thanks to certain movies and certain linguists there's enough to work from. It's also one of the (other) reasons I started taking the Duolingo Irish course, since I was interested in the consonant mutations.
I've also tried learning Mando'a (Mandalorian), since the entire grammar fits in ~5 sheets of paper, but the only thing I've retained is the ability to call someone idiotic.