He doesn’t really speak because of his cursed speech. His technique allows him to enhance any word he says, meaning if he says “Stop,” for example, whomever he’s speaking to will stop what they’re doing. He speaks in onigiri ingredients because they have no meaning, “Salmon” means “Yes.” “Benito flakes” means “no.” “Kelp” means “hello.” “Tuna mayo” means “do something” or “are you okay?” “Tuna” means “look.” “Mustard leaf” means that he is concerned.