Word level test ; Lexical complexity measure; Wortschatzreichtum; Lexical sophistication; Lexical diversity; Type-token ratio (lex.) ; Spracherwerb (lex.) ; Language acquisition (lex.) ; Vocabulary (language acquisition) ; Dual language acquisition; Bimodal language acquisition; Spracherwerb (biling.) ; Language acquisition (biling.) ; Bilingual language acquisition ; Australia (English language in) ; Australien (engl. Sprache in) ; English in Australia ; Samoan