criteria vary, but are generally related to kinship and/or language. Still, due to the cultural assimilation of the Sámi people that had occurred in the four countries over the centuries, population estimates are difficult to measure precisely. The population has been estimated to be between 80,000 and 135,000 across the whole Nordic region, including urban areas such as Oslo, Norway, traditionally considered outside Sápmi. The Norwegian state recognizes any Norwegian as Sámi if he or she has one great-grandparent whose home language was Sámi, but there is not, and has never been, any registration of the home language spoken by Norwegian people. Roughly half of all Sámi live in Norway, but many live in Sweden, with smaller groups living in the far north of Finland and the Kola Peninsula of Russia. The Sámi in Russia were forced by the Soviet authorities to relocate to a collective called Lovozero/Lujávri, in the central part of the Kola Peninsula. Language There is no single Sámi language, but a group of ten distinct Sámi languages. Six of these languages have their own written standards. The Sámi languages are relatively closely related, but not mutually intelligible; for instance, speakers of Southern Sámi cannot understand Northern Sámi. Especially earlier, these distinct languages were referred to as "dialects", but today, this is considered misleading due to the deep differences between the varieties. Most Sámi languages are spoken in several countries, because linguistic borders do not correspond to national borders. All Sámi languages are at some degree of endangerment, ranging from what UNESCO defines as "definitely endangered" to "extinct". This is due in part to historic laws prohibiting the use of Sámi languages in schools and at home in Sweden and Norway. Sámi languages, and Sámi song-chants, called joiks, were illegal in Norway from 1773 until 1958. Then, access to Sámi instruction as part of schooling was not available until 1988. Special residential schools that would assimilate the Sámi into the dominant culture were established. These were originally run by missionaries, but later, controlled by the government. For example, in Russia, Sámi children were taken away when aged 1–2 and returned when aged 15–17 with no knowledge of their language and traditional communities. Not all Sámi viewed the schools negatively, and not all of the schools were brutal. However, being taken from home and prohibited from speaking Sámi has resulted in cultural alienation, loss of language, and lowered