Langue des signes française; LSF; French Sign Language ; Spracherwerb (Schriftsprache) ; Language acquisition (written language) ; Kindersprache (Schriftsprache) ; Child language (written language) ; Schrifterwerb (psycholing.) ; Written language acquisition (psycholing.) ; Etymologie; Etymology ; Transfer (second language acquisition) ; Transfer (Zweitspracherwerb) ; Cross-linguistic influence (second language acquisition) ; Interference (second language acquisition) ; False friends; Falsche Freunde; Interference (lex.) ; Einfluss von Sprachen aufeinander (lex.) ; Languages in contact (lex.) ; Sprachkontakt (lex.) ; Lexical borrowing; Loan word ; French