Interestingly, unlike most Keets, he doesn't talk much, at least outside of his own gamenote the volleyball minigame in the Wii version of Samba De Amigo does have Amigo speaking through speech bubbles, implying that he might be able to talk; he mostly just makes maraca noises instead.
Then it turned out that the man giving the talk about pirates was a captain who had been hijacked by Somali pirates, and was doing public speaking about his experiences.
Himejima, whose native language is Japanese, tends to talk in German to be interesting, but the other (Japanese-speaking) characters respond like he's speaking Japanese anyway.