 The RCM Les Basques sees an important aging of its population and has the lowest share of youths between 0 and 19 years old (17.5), the population over 65 years old has the largest share (25.6%), and the average age of 51 years is the highest of the region in 2011.Nearly all residents of Bas-Saint-Laurent speak French as their mother tongue.According to the 2006, 98.6% of those who responded declared their native tongue to be French, 0.6% declared English, and 0.8% listed a different language.