State of the art ; Erstspracherwerb; First language acquisition; Ontogenese; Language acquisition ; Wortbedeutung (Spracherwerb) ; Bedeutungsentwicklung; Semantic development ; Spracherwerb (lex.) ; Language acquisition (lex.) ; Vocabulary (language acquisition) ; Sprachkreativität; Creativity; Kreativität; Linguistic creativity ; German ; English ; French