I wonder if any of the local dialect words go back to the pre-Roman language of the area. European countries sometimes have a wealth of dialects, Italy especially. Villages a few miles apart may have different dialects.
Modern Italian is primarily the Tuscan dialect. I think it was Mussolini who decided to base modern Italian around Tuscan. In southern Italy the Italian has a lot of Greek words in it that go back to the day - Pre-Roman days where the area was Magna Graecia - an area of Greek colonies.