Child language ; MLU; Mean length of utterance; Sentence length (child language) ; Dual language acquisition; Bimodal language acquisition; Spracherwerb (biling.) ; Language acquisition (biling.) ; Bilingual language acquisition ; Alternation (biling.) ; Language shift (biling.) ; Sprachwechsel (biling.) ; Uniform structure principle (biling.) ; Matrix language (biling.) ; Second language acquisition in children; Kindlicher Zweitspracherwerb; Child second language acquisition ; Interference (synt.) ; English (British) ; Grossbritannien (engl. Sprache in) ; Great Britain (English language in) ; Englisch in Grossbritannien; English in Great Britain; British English