Living in Saguenay Share: Culture The main language used in the Saguenay―Lac-Saint-Jean region is French. Less than 1% of the population’s inhabitants declared that they spoke English in the 2011 Census. Learning French is thus essential to your proper adaptation. Some families do however speak English fluently as well as French. The MFRC offers "French as a Second Language" and "English as a Second Language" courses of various levels at very economical rates for military family members. To find out more about our language course programming, click here.