awesome game, and cool concept! i would say to increase the chances of getting words out of the people, as after a while id end up going through like 5 before getting a new word D:
they also sometimes seem to mention having items they aren't offering (e.g. talking about getting rid of a flute but not having one)
but that aside i did enjoy the game quite a bit, and it was fun trying to patch together the meanings when i only had a few words to work with! good job :D