I'm trying to play the entire game as a cat and every time I try to talk to humans in the Wild Shape I can't: At least let our wild shape be in the cutscenes as the main character never talks in dialogues anyway. So, I don't think it's that hard to have the wild shape apear in dialogue and if for example we are playing an origin character that sometimes talks in dialogue, we can clearly see that animals have talking animations in the game, I don't see this why we can't have Wild Shape in cutscenes and dialogues.
and every time I try to talk to humans in the Wild Shape I can't: