Languages of Sweden
In 2009, the Riksdag passed the Language Law recognizing Swedish as the "main" and "common" language of society as well as being the official language in "international contexts", the five national minority languages, and Swedish sign language .
Swedish Sign Language
Swedish sign language first came into use in 1800. It does not stem from any other languages. In fact, this self-created language went on to influence Finnish sign language and Portuguese sign language. 1809 marks the year of the first deaf school in Sweden. It was not until 1981 that Swedish Sign Language was recognized as a national language of Sweden.