Svorsk
Svorsk or Svorska is a portmanteau of svensk(a) 'Swedish' and norsk(a) 'Norwegian' to describe a mixture of the Swedish and Norwegian languages. It could be translated as Sworwegian in English.
The term svorsk is used to describe the language of someone who mixes words from their native tongue with the other language. The phenomenon is common, 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. The term originates from the 1970s.
Individual Swedish loanwords and phrases that are assimilated into a language, including Norwegian, are called svecisms. This trend has been ongoing in Norwegian since the dissolution of the Dano-Norwegian Union in 1814; however, it gained momentum substantially after the dissolution of the union between Norway and Sweden in 1905 and has been an ongoing phenomenon of Norwegian linguistics, and still is. Indeed, the prominent Norwegian linguist Finn-Erik Vinje characterizes this influx since World War II as a breaking wave.
There's no one specific vocabulary used in Svorsk; versions range from borderline joke speech to knowing and using a reasonable set of core words from the other language.
In popular culture, the concept of svorsk has also inspired artistic projects, including musical acts that play on the term in their name, such as the band Svorsk Torsk, referencing the hybrid linguistic identity in a humorous and self-reflective way.