Dialects: None known. Partially intelligible with French Sign Language ,.
Genealogy:
Demographics: 12,000 (2011 census).
Language Use: Used since 1786 when deaf schools began. Dialect used in schools differs from adult use outside. Interpreters required in court; some provided for college students and important public events. Sign language instruction for parents of deaf children. More than one sign language used.
Language Development: Films. TV. Videos. Dictionary.
Typology: Finger-spelling system.
Nation of Origin: Czech Republic