Sentence:  Stanford finds that women from the South who marry into North households maintain their Southern pattern almost perfectly, and children acquire much of this <WSD>matrilect</WSD> in their initial language learning period of 3 to 5 years of age. 
Meaning of the word marked with <WSD> tags:  The idiolect of the mother or the mother's clan in a household where the mother and the father speak different idiolects.