Speech shadowing; Repetition (psycholing.) ; Nonword (psycholing.) ; Nichtwort (psycholing.) ; Word manufacture; Kunstwort; Pseudo-word ; Syntactic development; Morphological development; Morphologie (Spracherwerb) ; Syntax (Spracherwerb) ; Grammatical development ; Word length (child language) ; Kindersprache (Sprachverständnis) ; Children's comprehension of language; Language comprehension in children ; Dual language acquisition; Bimodal language acquisition; Spracherwerb (biling.) ; Language acquisition (biling.) ; Bilingual language acquisition ; Speech perception (biling.) ; Sprachperzeption (biling.) ; Bilingual speech production/perception; Zweisprachige Sprachproduktion/Sprachperzeption; Language processing (biling.) ; Sprachverständnis (biling.) ; Speech production/speech perception (biling.) ; English (American) ; USA (English language in the) ; USA (engl. Sprache in den) ; English in the USA; Englisch in den USA; American English ; Chicano; Puertoricans; USA (span. Sprache in den) ; Mexican American Spanish; USA (Spanish language in the) ; Spanglish; Inglañol; Tex-Mex; Spanish in the USA