Sign language (pragm.) ; Gebärdensprache (pragm.) ; Conversational analysis (sign language) ; Langue des signes française; LSF; French Sign Language ; Bimodal language acquisition; Language acquisition (sign language) ; Spracherwerb (Gebärdensprache) ; Sign language (language acquisition) ; Hörende Kinder gehörloser Eltern; Children of Deaf adults; CODA; Deaf children of hearing parents ; Gesprächsstil; Conversational style ; Baby talk; Motherese; Child-directed speech; Ammensprache; Babysprache; Infant-directed speech; Fatherese; Language spoken to children ; French