Drang is only +8, so I didn't read the DC29 spoiler. But wow this screams trap.

To Melhved, in dwarven, "you speak the tongue? I didn't expect that. This seems really dangerous."

In common, "Without speaking to anyone else? What's that about? The halfling wasn't doing any work anyway, right?" Big smile. Massive diplomacy check.

(1d20+7)[23]