The fork is more likely to have arrived in France via its neighbour Italy when Catherine De Medici married Henry II because the Italians were definitely using forks before the French.
Pretty close, but a generation off. It was their son, Henry Valois, who introduced it to France when he left Poland for France, making a stop in Venice on the way, which is where he probably picked up the custom. Henry was at first king of Poland, for about six months, but abandoned the throne to become King of France. He was not of Polish ancestry. In any case, the idea that the fork was introduced to France from Poland is a myth.