Language is the expression of human communication.
It is a specific method, style, or form of communicating for individuals or groups of individuals. It frequently occurs in normally-developing children, usually between three and seven years of age, and is characterized by the gradual or sudden loss of the ability use or comprehend spoken language. It is a rare disorder, with approximately 160 cases diagnosed between 1957, when the syndrome was first identified, and 1990. The following are the most common indicators of Landau-Kleffner syndrome, however, individuals may experience symptoms differently. Spoken language is eventually affected, which may lead to complete loss of the ability to speak.