Character mistake: Merlin tells Arthur that Pendragon means Son Of the Dragon when it actually means Top Dragon or senior leader. Pen is Welsh for top not son.
The Last Legion (2007)
1 character mistake
Directed by: Doug Lefler
Starring: Colin Firth, Ben Kingsley, Peter Mullan, Aishwarya Rai Bachchan
Revealing mistake: As Aurelius and Wulfila fight, one shot after Aurelius lifts a long-handled battle axe, we can see two shots with a jet contrail in the sky, which were impossible in the 5th century AD.
Romulus Augustus: Mother, am I now the most powerful man in the world?
Flavia: Of course you are.
Romulus Augustus: Then why can't I stay out tonight?