It must not be confused with the current native spoken language of Oslo, Standard East Norwegian.
As a contrast, the upper and middle classes would speak a language more akin to Dano-Norwegian.
Since the end of the 20th century, the Oslo dialect has been in decline due to higher education levels, growth of media, and larger social mobility.
[1] This has caused the Oslo dialect to be considered a low-standard language, which is occasionally looked down upon in modern times.
Standard Eastern Norwegian dialect in brackets, along with English translation in italics.