I read an article in which it is written that such swords, strongly decorated with inscriptions, were made for processions that Shiites conduct on the holiday of Ashura. Also, such swords were made for actors "tazieh" who performed religious mystery (performance). And at a later time, such swords were made especially for Europeans, as an "oriental exotic" ...
But I like these swords as a work of art. True, I like straight swords more
Tazieh - https://en.wikipedia.org/wiki/Ta%27zieh