That Time I Got Reincarnated as a Slime: Tensei shitara Slime datta Ken

[DarthEnderX]

Also, I'm not a fan of the 'Maou' moniker- as was mentioned, most demon lords are anything but demons... Dragons, slimes, vampires, a bird, some non-specific demon-like thing, a fairy... Can we just start calling them something more descriptive, like maybe Supreme Beings, Tyrants, Powerful Idiots, or something else that might actually uniformly describe what they are and how they relate to the world around them?

That won't happen because it's insistent terminology dating all the way back to Dragon Quest.

Rulers of monsters are always gonna be Demon Kings/Lords.

I would prefer it translated to something like Dark Lord. Although DQ originally translated it as Archfiend.(Archfiend Baramos in DQ3 was the series first "maou")