How Do We Say "Dragons Are Not Slaves" in Old Valyrian?
And we have an answer!:
Game of Thrones Linguist Interview Reveals High Valyrian Dragons, Wrong Khaleesis, and More:
Zaldrīzes buzdari iksos daor.
“A dragon is not a slave.”
Of note here: the word for dragon, zaldrīzes. Also, buzdari is stressed on the second syllable even though the a is not long because this isn’t actually a High Valyrian word: It’s an Astapori word that Dany is using on purpose. The High Valyrian word for slave is dohaeriros (whose root you may recognize), but the word they use in Astapor is buzdar, which has its roots in Ghiscari.