Rename Merchant to the more generic name of Communicator.
Replace description with:
Communicators focus on social interaction as diplomats, linguists, missionaries, politicians or traders. They are the experts in persuasion, explicit and implicit, and are equally comfortable in dealing with individuals and groups.
Leave Favored Categories (*), Key Stats, and Professional Abilities as is.
(*) One possible tweak might be to swap out one of Scientific, Subterfuge or Vehicular for Artistic.
Use the Xenodiplomat TP as well.
Best wishes,
Nicholas