Snapchat is adding to its options with a new Lens, an animated filter in augmented reality specially dedicated to sign language. The idea is to encourage users of the social network to learn American Sign Language through fun little activities. This new feature was developed by a team of deaf and hard-of-hearing Snap employees, in partnership with the SignAll startup. The Alphabet Learning Lens in question teaches users, for example, how to spell their names and practice sign language through relatively simple and instinctive quick games. SignAll’s technology allows tracking of hand movements …