In step 1, Gin mainly speaks english but he's trying to learn japanese, german and mandarin. Since he's a quick learner and likes learning new things, he gets the hang of them pretty easily, already speaking japanese fluently by step 2, german and mandarin not so much, since he got bored of them. In step 3 he already knows english, japanese, german and mandarin, starting to learn some others like, spanish, french and russian.