[Jean Bobon and the psychopathology of language].

In the field of "language psychopathology", Jean Bobon's works on delusional languages, specially his studies on neologisms and glossolalia, represent the most systematic collection of clinical observations up to date. In placing emphasis on the register of delusional speech acts, Bobon's research re-center language psychopathology around the concept of "signifier". It thus enables a psycho-analytical approach to clinical study of psychoses and its elaboration.