u/AeriDorno

It's been a while since I read The Silmarillion, and I've not read any of the books within HoME, but I don't remember Melkor (quenya, I believe?) being given any other name than Morgoth (named so by elves) or Bauglir (named so by elves). He is also given or ascribed other epithets such as "King of the Arda/the world", which he gives himself if I remember correctly.

Due to the meanings of the names Morgoth and Bauglir and their elvish origin it would seem strange if his orcs, for instance, called him by those names. Would they have used the quenya name Melkor? That also seems strange to me. So would they simply have called him "King" or "The Dark Lord" or some such?

Does this ever come up in the Legendarium? What are your thoughts?