Sentence:  On the other hand, there is the <WSD>'father tongue</WSD>', which is native to no one: an 'excellent dialect', 'immensely noble and indispensably useful', that we have to go to college to learn fully. 
Meaning of the word marked with <WSD> tags:  The form of language that is acquired through education and books, as opposed to the dialect one grows up speaking; formal or educated language.