The two official languages in Finland are Finnish and Swedish. 90% of the population are Finnish-speaking and 5.4% are Swedish-speaking. Finland is divided into 320 municipalities, of which 30 are bilingual and the rest unilingual with either Finnish or Swedish as the primary language. Most of the bilingual municipalities are located on the west coast.
The basis for the linguistic rights is section 17 of the Constitution. The Language Act further elaborates on the linguistic rights of the two national languages and in addition, there are laws containing provisions on language matters in other legislation aswell. Moreover, Finland is bound by several international treaties.
People with some other mother tongue than Finnish or Swedish comprise 4.5% of the total population. The biggest language groups after Finnish and Swedish are Russian, Estonian, Somali, English and Arabian. According to the Constitution, the Sami, as an indigenous people, as well as the Roma and other groups, have the right to maintain and develop their own language and culture.
More information on the language climate in Finland can be found in Chapters 2 and 9 of the Report of the Government on the application of language legislation 2013