This is the 17103rd most frequent Polish word.
węgierski
Hungarian.
Here, 'węgierski' is used as an adjective to describe the origin of the dish, referring to Hungary.
Węgierski paprykarz jest popularnym daniem w Polsce.
Hungarian goulash is a popular dish in Poland.
In this sentence, 'węgierskiego' is used as an adjective in the genitive case to describe the language being studied, referring to Hungarian.
Uczę się języka węgierskiego, bo chcę odwiedzić Budapeszt.
I am learning Hungarian language because I want to visit Budapest.
Here, 'węgierskie' is used as an adjective in the accusative case to describe the origin of the wine, referring to Hungary.