This Alberta Official Statistic shows the proportion of population by mother tongue in the eight Alberta economic regions for the 2011 Census year. Alberta is divided into eight economic regions as follows: Lethbridge – Medicine -Hat; Camrose-Drumheller; Calgary; Banff – Jasper – Rocky Mountain House; Red Deer; Edmonton; Athabasca – Grande Prairie – Peace River; and Wood Buffalo – Cold Lake. Mother tongue refers to the first language learned at home in childhood and still understood by the person on May 10, 2011. Non-official languages are languages other than English or French. According to the 2011 census, 77.8% of Albertans reported English as their mother tongue, followed by a non-official language (20.1%), and French (2.1%). The Red Deer economic region reported the highest proportion of Albertans with English as a mother tongue (89.7%) and the lowest proportion of Albertans with a non-official language as a mother tongue (8.9%), while Calgary reported the lowest proportion (73.4%) of Albertans with English as mother tongue and the highest proportion of Albertans with a non-official language as a mother tongue (24.9%).