The LSE (Sign language, Spanish) is the sign language used by the community deaf in Spain as the primary means of communication. The LSE is a natural language, with the its grammar, syntax and vocabularyused for to express concepts and ideas through the combination of gestures, facial expressions, and body movements.

In Spain, the LSE is recognized as an official language, and protected by the law on disability,2007, along with the sign language, Catalan, valencian, and galician.