Along with the formation of the Scandinavian languages group, no longer existed and preexisting dialects. Sharp linguistic boundaries between adjacent dialects, too, did not appear. Throughout the Middle Ages all the Scandinavian languages are similar, including written and literature of their shape. In feudal times there is also no more need for the complete separation of languages, since it is not formed yet neither the state nor the people, by and large, not divided clearly enough to ethnic and territorial basis. Separated from each other languages begin with the development of state, commerce and capitalism in the period from 15 to 18 century. Of Norway's literary language, which existed at the time of the initial stage of its development in 16 century actively ousted Danish literary language, which led to the rupture of the state of the literary language with the language used to everyday communication.
It was only after almost two centuries, the Danish language, which existed in Norway began to form in the Norwegian language, literature or riksmol exists in the present. Along with riksmolom forms the second literary language based on dialects of Norwegian farmers, it was named landsmol. Virtually impossible to distinguish between neighbors with each other Scandinavian languages, namely Danish, and Swedish languages, Swedish and Norwegian languages. The sharp distinction between the languages is viewed only in the literary and public forms. Icelandic language is developed enough apart, it hindered the formation of a sluggish social and economic development. This also applies to fereyskomu language. Thus, the division of the Scandinavian languages in eastern and western groups are gradually receding into the background. There is another classification, according to which the Norwegian, Danish and Swedish are included in one group, and Icelandic and fereysky languages form another group. However, despite the fact that there are differences in the languages of the Scandinavian group, they have many common, which can be attributed to the ancient dialectical relation and similarity in social and economic development to date of countries.