Baby talk; Motherese; Child-directed speech; Ammensprache; Babysprache; Infant-directed speech; Fatherese; Language spoken to children ; Dual language acquisition; Bimodal language acquisition; Spracherwerb (biling.) ; Language acquisition (biling.) ; Bilingual language acquisition ; Zweisprachigkeit; Bilingualism ; Mehrsprachengrammatik; Multilingual grammar; Contrastive linguistics ; English ; Eskimo-Aleut languages