They have the ability to pronounce 'human' correctly (e.g. "A human drink. It's called root beer"). They choose to deliberately mispronounce it as an intimidation tactic.

they can they just won't

Still less absurd than Data's contractions (except all the times he actually used them). Maybe it was something he was programmed to tell humans so that even being superior to them, people would still be able to point to one thing they could do better.

I love how your legit using a screenshot from a scene where this is explained lol.

It's called having an accent.

Can we all agree that Ferengi's have the best drip in the galaxy? Quark's outfits are always incredible.