A new movie comes out this weekend called The Tribe. All the characters in the film communicate with sign language. There is no translation for the audience of any kind. No subtitles. No voiceover. The Tribe is set in a Ukrainian boarding school for the deaf. It’s not a happy, hopeful place; it’s dark and slightly sinister, and the kids, at least the ones the film follows, aren’t so much students as gangsters, thieves and pimps. We hear from the director.