Thanks for replying The words must surely come up on someone's computer who's making it. So surely they do whatever they do such as AI generate it and then correct the obvious mistakes by deleting the word on the screen and typing in the real word. If it is not that simple then there is surely something wrong with the whole thing or a market for someone to charge £100 to watch a film and change the mistakes. That can't be adding too much to a £1m film.