This is the 969th most frequent Catalan word.
català
The Catalan word "català" means "Catalan" in English, referring to the Catalan language or something/someone related to Catalonia or its culture.
Here, "català" is used as a noun referring to the Catalan language.
Parlo català amb els meus amics.
I speak Catalan with my friends.
Here, "català" is used as an adjective describing the book as Catalan.
El llibre català és a la taula.
The Catalan book is on the table.
Here, "català" is used as a noun referring to a person of Catalan origin or nationality.