Norwegian is closely related to and generally mutually intelligible with its neighbour Scandinavian languages; Danish and Swedish, and the three main Scandinavian languages thus form both a dialect continuum and a larger language community with about 25 million speakers. All three languages are commonly employed in communication among inhabitants of the Scandinavian countries. As a result of the co-operation within the Nordic Council, inhabitants of all Nordic countries always have the right to communicate with Norwegian authorities in Danish or Swedish as equal alternatives to Norwegian. In the 19th and 20th centuries, the Norwegian language was subject to strong political and cultural controversies. This led to the development of Nynorsk in the 19th century and to the formation of alternative spelling standards in the 20th century.