Syntactic development; Morphological development; Morphologie (Spracherwerb) ; Syntax (Spracherwerb) ; Grammatical development ; Dual language acquisition; Bimodal language acquisition; Spracherwerb (biling.) ; Language acquisition (biling.) ; Bilingual language acquisition ; Transfer (second language acquisition) ; Transfer (Zweitspracherwerb) ; Cross-linguistic influence (second language acquisition) ; Interference (second language acquisition) ; Second language acquisition in children; Kindlicher Zweitspracherwerb; Child second language acquisition ; Interference (synt.) ; Clitic left dislocation; CLLD; Dislocation, clitic ; Clitic combination; Clitic placement; Word order (clitics) ; Canada (English language in) ; Kanada (engl. Sprache in) ; English in Canada ; Kanada (span. Sprache in) ; Canada (Spanish language in) ; Spanish in Canada