Was Modremoth more intelligent than other dragons? Because we faced 4 dragons already, and only one of them can talk: what about Jormag and Bubbles?
I'd personally want to hear the dragons' voices, maybe they would say the things like: I'll devour you, or something, but to me, it would seem more lively than just some roars and screams.
I thought that with Mordremoth's magic, the dragons will get this ability to speak- somehow gained from this magic. But it seems that only Mordremoth was that brainy.
What about Glint, how did she gain this ability to speak- did Forgotten give her such ability, when they cleansed her? And why Vlast couldn't speak out loud? Will Aurene have her voice-actress, too- at some point?
Seek, and you shall find.