Languages of Sweden
The Kingdom of Sweden is a nation-state for the Swedish people, and as such, their national language is held in very high regard. Of Sweden's roughly ten million people, almost all speak Swedish as at least a second language, and the majority as a first language (7,825,000, according to SIL's Ethnologue). Swedish is also an official language in Finland where it is spoken by a large number of Swedish-speaking Finns. The language is also spoken to some degree by ethnic Swedes living outside Sweden, for example, just over half a million people of Swedish descent in the United States speak the language, according to Ethnologue.
Finland Swedish
Finland Swedish is regulated by the Institute for the Languages of Finland. Official Swedish is not supposed to be very different from Swedish as found in Sweden. There are however e.g. words regarded as archaic in Sweden, but commonly used in Finland, and terms that differ from their counterparts in Sweden, often because of slight differences in the related legislation.