reading a lot of the messages about dialogue for Judges in the screen play extracts I thought you might be interested in the opinion of a copper. I'm a shift officer in a built up city area and I find that as an interviewer one of the most important skills you can pick up is having an ear for peoples speach patterns as it's a very good way of telling whether someones feeding you a lie. To do this you have to speak naturally and in colloquilisms as any more formal speach puts people onto the defensive and it makes it that much harder to tell if they're being honest or not. The other thing you notice in a job full
of new graduates is how quickly people adopt regional expressions. I think -admittedly fictional- judges would talk in a non-stilted manner if only to faciliate communication with the public.