sentences:  The phenomenon is not uncommon, especially in light of the close business and trade ties between the two countries and the mutual intelligibility between the two languages, the latter in its turn being due to the common ancestry and parallel development of both Norwegian and Swedish from Old Norse (see "North Germanic languages").The term originates from the 1970s.Individual Swedish loanwords and phrases that are assimilated into the Norwegian language are called "svecisms" ("svesismer").