About 10 % of Liberia’s people are Christian, principally Protestant. Islam has made progress among the people of the interior, who have largely retained their animist religions. Altogether, about 70 % of the people follow orthodox religions and 20 % are Muslim. English is Liberia’s official language but is spoken by only about one-fifth of the people. The remainder speak various African languages which mainly belong to the Mande, West Atlantic, or Kwa linguistic groups.