This is apropos of nothing, but I do think that Jonah’s powers have nothing to do with speech. He can’t do the Archivist’s question thing that forces truth from people’s lips. No, his focus is on eyes, on Seeing. He sees through any eyes he wants, and it’s eye contact with him that bares all secrets to his gaze, that allows him to force other people’s memories, gazes and experiences into the viewer’s mind.