Mother tongue of married spouse or common-law partner (10), mother tongue of child (10), mother tongue of other married spouse or common-law partner (10), language spoken most often at home by married spouse or common-law partner (10), language spoken most often at home by child (10), language spoken most often at home by other married spouse or common-law partner (10), age group of child (2) for children under 18 years of age in couple families in private households, Census, 2011