Syntaktische Merkmale; Syntactic features; Full interpretation, principle of; Interpretierbarkeit (Grammatiktheorie) ; Interpretability (theory of grammar) ; Features (synt.) ; UG; Universal grammar ; Functional category (second language acquisition) ; Funktionale Kategorie (Spracherwerb) ; Funktionale Kategorie (Zweitspracherwerb) ; Second language acquisition (psycholing.) ; Transfer (second language acquisition) ; Transfer (Zweitspracherwerb) ; Cross-linguistic influence (second language acquisition) ; Interference (second language acquisition) ; Triggering (second language acquisition) ; Parametrization (second language acquisition) ; Critical period (second language acquisition) ; Alter (Einfluss auf Zweitspracherwerb) ; Age (influence on second language acquisition) ; Ultimate attainment (second language acquisition) ; Near-native competence (second language acquisition) ; AoA; Age of acquisition (second language acquisition) ; Sensitive period (second language acquisition) ; Topic drop; Diskursbindung; Discourse linking; Discourse topic ; Null object; Objectless clause ; English ; Mandarin; Kantonesisch; Cantonese; Putonghua; Sinitic; Hakka; Yue; Chinese