Langue des signes française; LSF; French Sign Language ; Bimodal language acquisition; Language acquisition (sign language) ; Spracherwerb (Gebärdensprache) ; Sign language (language acquisition) ; Erstspracherwerb; First language acquisition; Ontogenese; Language acquisition ; Sozioemotionale Entwicklung; Socioemotional development; Language acquisition and psychological development ; Taubheit; Deafness ; French