We encourage our international students to subscribe to the online Norwegian class offered by the University of Oslo. More information can be found here.
Currently, USN does not offer any language courses for international students, but the institution is working on developing courses for the future.
There are volunteer organizations and private/public organizations that offer language classes to foreign citizens. In general, most providers charge a fee from students.
You may check out https://www.folkeuniversitetet.no/eng/Language-courses
or check with the local community in your area.