motherese
noun [ U ] language specialized uk/ˌmʌð.əˈriːz/ us/ˌmʌð.ɚˈiːz/
母亲用语（指母亲跟幼儿交流时用的类似幼儿语的语言）
the simple form of language mothers often use when talking to their babies
the special sing-song way in which parents vocalize to their infants, known as "baby talk" or motherese 父母对婴儿说话时发出的简单音节，称为“婴儿语”或母亲用语