Finnish and Swedish are the official languages. More than 93 percent of the population speaks Finnish, a Finno-Ugric language . About 6 percent of the people, concentrated largely in the Ahvenanmaa archipelago, speak Swedish. The Saami speak Saami, a dialect of Finnish. The Evangelical Lutheran Church of Finland is the principal national church, and its members make up 89 percent of the population; freedom of worship is, however, guaranteed to all faiths. The Orthodox Church, still a national church, has sharply decreased in numbers since World War II (1939-1945).