Verified answer

Well if there is a villager there with no indication from which village he is from. Then the man should ask: "Which road leads to your village?". If it was the truthful person than he would point to the truthful village, but if he came from the village where everyone told lies he would still point to the truthful village as he'd be lying about what village he came from. So that person would always point to the truthful village anyways.

which road goes to your village?