In order to fulfil the qualification requirements in Swedish when applying for university studies in Sweden, you will need an approved grade in one of the upper secondary school courses Svenska 3 or Svenska som andraspråk 3. You will need at minimum the grade E.

If you are not duly qualified in Swedish, Tisus is one way of showing your knowledge in Swedish and achieving qualification. 

More information on qualification requirements in Swedish, and other ways of demonstrating your knowledge in Swedish, is available at antagning.se:
antagning.se/sv/Det-har-galler-for-dig-som-gatt/Utlandsk-gymnasieutbildning/Det-har-behover-du-ha/Behorighet-i-svenska/