What is a training sword called in fencing?

The weapon used for training in the Fencing duel era was called the foil (fleur). It is still used as one of the 3 weapons for fencing today, although it has never historically been a real weapon used for combat.

There isn't a training sWord in fencing. Originally the foil (see above) before the sport fencing - like we know it now - exsisted. Now you choose a weapon (like the foil) and train with that. So in fencing there is no training sWord.