I’m fluent in English and it’s my native tongue. I don’t like Spanish since Ive been taking classes in school since 2nd grade and know nothing (going into 8th grade). I downloaded a Korean and Japanese app on my iPod to help learn the languages. I started with hiragana. I also want to learn Mandarin though. Are Korean, Japanese , and Mandarin all helpful to know? Which is hardest and the easiest?