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