Topic: Italicizing new words on first use?
Opinions, please. I'm wondering when to italicize new words. Following are four examples.
1) Tactical overlays showed their light nova cannons, heavy supernova cannons, and shields readying for battle.
2) “Warning, intruder alert!” Aussie said. “Imperial Classiarii are now boarding this vessel!”
3) "Gobs! The whole galaxy?" Joseph asked, his eyes round as saucers.
4) Apollo was sole Heir to the Imperium Romanum.
Number one seems correct.
In number two, the new word is Classiarii (it's a real word from the Roman Empire). Are new words in dialogue italicized? It could make it seem as if the speaker is stressing the word, rather than the narrator.
In number three, the new word is gobs (like gobsmacked). Same as number two?
In number four, Heir to the Imperium Romanum is a formal title. Should it be italicized on first use?
I'm also not sure what to do with all the other made up words in the book. Do I italicize all of them on first use?