[quote=@Saiten Algard]
I know the monsters aren't supposed to show their true forms, but are they allowed to tell each other what they are, or are they not supposed to talk about it at all?
[/quote]

I believe the rule was that they aren't supposed to reveal what their true form is to anybody, since that would defeat the purpose of being taught to blend in with humans if they had such a loose tongue, but obviously that rule isn't exactly the best kept one lol