The maps wrong. In northern Norway (marked in lavender) the terms Bibliotek and Girjerádju are both used depending on whether you’re speaking Norwegian or one of the Sami languages. Despite being indigenous to the region Sami is spoken by a minority and the map should be striped red and lavender. Or if you’re going by indigenous languages then you need to extend the lavender portion down through northern Sweden to Luleå and in Norway down to Trondheim.