I think it is similar to on Dwilight where everyone not in the moot calls it just the moot but those in it call it by its full name, the Veinsormoot.
Not really. We also use 'moot internally, except when we can easily copy-paste the whole unpronouncable (funky spelling), unwrittable (funky letters), and unrememberable (funky sounding) name.
"Draconic Union" in no way is as funky as the 'moot's real name. After all this time, I still can't remember how to spell out the 'moot's name correctly.