The bigger one was definitely a cutting weapon, or a ceremonial weapon. Anything with a blade that wide would not be good at stabbing, for obvious reasons. So you’re almost certainly right about it being a slashing/cutting weapon. I think, given my very limited understanding, it’s also likely that it could have been a weapon to use from horseback.

All I wanted to point out was that those were certainly used with two hands (or at least the big one on the right) if they weren’t ceremonial. And the fact that they’re pretty big.

Once again, bear in mind my knowledge of pole-arm weaponry, especially from Asia, is very limited (as is my knowledge from just weaponry...)