This is the 7788th most frequent Swedish word.
tyska
"Tyska" means "German" in English.
Here, 'tyska' is used as the name of the language German.
Jag gillar att lära mig tyska.
I like to learn German.
In this sentence, 'tyska' is used to indicate that the books are written in the German language.
Många böcker på biblioteket är på tyska.
Many books in the library are in German.
Here, 'tyska' refers to the fact that the friend speaks the German language.