This is the 994th most frequent Swedish word.
allsvenska
The top professional league for football (soccer) in Sweden.
Here, "Allsvenska" is used as a proper noun to refer to the top Swedish football league.
Hennes pojkvän spelar i Allsvenska.
Her boyfriend plays in the Allsvenska.
Here, "allsvenska" is an attributive adjective used to describe the type of title being discussed.
Att vinna den allsvenska titeln är en stor ära.
Winning the Allsvenskan title is a great honor.
In this sentence, "allsvenska" serves as an adjective specifying the teams as belonging to the Allsvenskan league.