Bean does not change. He does not learn French. He does not become polite. But his immutability forces the world to change around him. The plot is not "Bean evolves"; the plot is "The universe adapts to Bean."
He can’t understand French announcements: “Ce train va à Cannes.” Bean nods. Then: “Ce train ne va pas à Cannes.” Bean doesn’t notice. Mr Bean Holiday Script
From a scriptwriting perspective, this is perfect cause-and-effect logic. Bean doesn't try to ruin this man’s life; he just wants a nice shot for his home movie. The rest of the film is Bean’s accidental quest to reunite Sabine with her father in Cannes, culminating in the screening of the "film within a film." Bean does not change
, on board, while the father is left standing on the platform. Misadventures and Roadblocks But his immutability forces the world to change around him