This is the 649th most frequent Swedish word.
italienska
"Italienska" means "Italian" (the Italian language) in English.
In this sentence, 'italienska' refers to the Italian language, which the speaker is studying.
Jag studerar italienska på kvällarna.
I study Italian in the evenings.
Here, 'italienska' modifies the noun 'köttbullar', indicating that the meatballs are prepared in the Italian style.
Hennes favoriträtt är italienska köttbullar.
Her favorite dish is Italian meatballs.
In this sentence, the related form 'italiensk' describes the nationality or origin of the artist.