Second language acquisition (psycholing.) ; Third language acquisition ; Transfer (second language acquisition) ; Transfer (Zweitspracherwerb) ; Cross-linguistic influence (second language acquisition) ; Interference (second language acquisition) ; Indefinite article; Definite article; Unbestimmter Artikel; Bestimmter Artikel; Article ; Epitheton; Classifier ; Number ; Definiteness; Specificity ; English ; French ; Mandarin; Kantonesisch; Cantonese; Putonghua; Sinitic; Hakka; Yue; Chinese