"Two Solitudes" refers to a perceived lack of communication, and moreover a lack of will for communication between Anglophone and Francophone people in Canada. The term was popularized by Hugh MacLennan's novel Two Solitudes. In her investiture speech as Governor-General of Canada, Michaƫlle Jean specifically stated that "the time of 'two solitudes' had finished".
References
Two Solitudes (Canadian society) Wikipedia(Text) CC BY-SA