That a truly scary idea: fairy legal drama. I'd probably have it be barely comprehensible to mortals -- to the point they might not even recognize it as a legal fight until some kind fairy mentions it, just in time for them to mount a defense. ::cackles evilly::
I was thinking of it resembling a 'norma' court just enough for them to be thrown by the differences. I was thinking of having the opposing lawyer be a troll that the covenant spokesperson has to wrestle with. If found guilty, they submit to the usual punishment - saving a damsel from a dragon.