It specifically says he can put utterances in wands. It doesn't duplicate existing spell effects; there are rules for putting utterances in potions that are somewhat detailed, and then there's a section about spell-trigger items that's mostly fluff (kind of like "It can be done, but most people don't because of *insert reason*, but such items can be found in treasure."), but pretty definitive crunch-wise that utterances are spell-likes that can be put in spell-trigger items. Probably further proof that the author of the truenaming section knew jack shit about D&D, but it's in the rules, and it helps Truenamers (ToM, page 262).