Who writes the spells in the film? JK Rowling or Steve Kloves (movies 1-4)?
From JKRowling.com: Spells in the films – there I’ve lost track. Steve invented some and I gave him others. Some of the new incantations, such as ‘lacarnum inflamari’ must have sounded more dramatic onscreen – although by the time you’ve managed to say ‘lacarnum inflamari’, you’ve surely lost precious seconds in which the Devil’s Snare might have throttled you. But that’s showbiz.
