I think you are quite right, saro. Dragons are part of European culture - and different dragons, that are spoilt, not fought, are part of several East Asian cultures. In addition, dragons are fought with lances, not swords. Makes sense if they spit fire.
Also, the word sword is a bit of a misnomer since a sword is in principle straight and its primary use is stabbing, so it should be held point forward when charging (Hollywood disagrees on this.) This is a scimitar, a bent sabre, used for hacking. It is much lighter than your average sword, so fatigue is less of a problem for the owner and a major problem for a swordsman.
Peter