Children who are born into mixed language or immigrant families have an early language development which is in many ways different from that experienced by those born into monolingual majority language families. ... Many children at this stage will also answer a question like 'What does daddy say?' from the mother with the word in the father's language (which would not usually be used to the mother).
――京都工芸繊維大学 後期日程(3月12日実施)――2005年