HZ: ‘Vampyre’ with a Y was pretty interchangeable with ‘vampire’ with an I when it first landed in English. Actually, I think the first appearance in English was with a Y. We probably got it from French or German, but it was based on - it’s a little unclear, but it was based on Hungarian, possibly, or Slavic languages. And it was because, at the time, they were doing a lot of coverage of the Serbian vampire epidemic of 1725 to 1732.
JENNY OWEN YOUNGS: Oh, of course.
HZ: Apparently there were a lot of Eastern European vampire epidemics.
KRISTIN RUSSO: What is a vampire epidemic?
HZ: I assume an epidemic of vampires. Imagine Covid, but for vampirism. And no vaccine. No masking is going to save you.

HZ: Approximately how many languages have you invented at this point?
DAVID PETERSON: I think I've invented over 50 languages at this point. Not all of them are very large in terms of vocabulary size, and not all of them are very good. I had created about 17 before I ever started working on Game of Thrones.

HZ: The languages you hear in Game of Thrones: Dothraki -

[CLIP] Khal Drogo: “Moon of my life, are you hurt?”

HZ - the various dialects of Valyrian:

CLIP: Daenerys: “Valyrian is my mother tongue.”

HZ: - those aren’t the actors making up some gibberish. Those are functional languages, with large vocabularies and complex grammars and etymologies.