Language has nothing to do, if it is wisely expressed through actions (body movements) & emotions (face expressions). Moreover it doesn't effects the quality & class of the film too. The silent films has also its appeal. Films of Charlie Chaplin & Kamal Hassan's 'Pushpak' are the good examples of acting. The class of acting is required in silent films. It is not easy to express yourself without a word or dialogue. Full marks to Charlie & Kamal. That is why they are well-known personalities in the film history.
