Gibson When production chiefs from selected studios trooped to Icon Prods. headquarters after an invite to read the film Mel Gibson planned for summer 2006, they were surprised at the very first page of the script. "The dialogue you are about to read will not be spoken in English." Gibson, who last made the most successful Aramaic-language film ever, is at it again. "Apocalypto" hardly fits the traditional definition of a summer film. Set 500 years ago, pic will be filmed in an obscure Mayan dialect, presumably with the same kind of subtitles Gibson reluctantly added to "The Passion...