Sign language ; ASL; American Sign Language ; Bimodal language acquisition; Language acquisition (sign language) ; Spracherwerb (Gebärdensprache) ; Sign language (language acquisition) ; Ambiguity (theory of grammar) ; Ambiguität (Grammatiktheorie) ; Principles and parameters theory; Prinzipien- und Parametermodell; Parametrization ; Erstspracherwerb; First language acquisition; Ontogenese; Language acquisition ; Syntactic development; Morphological development; Morphologie (Spracherwerb) ; Syntax (Spracherwerb) ; Grammatical development ; Null subject; pro-drop; Subjectless clause ; Licensing (synt.) ; English (American) ; USA (English language in the) ; USA (engl. Sprache in den) ; English in the USA; Englisch in den USA; American English ; Italian
