I am learning a new (or 2 new) language-s right now for the challenge. I guess I just want to prove to myself that I can do it. I don't know if this will be enough motivation for me in the future though, but I've proven to be quite good at picking up languages (basing from past language classes I took in the past, I just didn't continue it then though). Also, for Japanese, I really like Japanese literature, stories and media and would like to read some of it in the original.