What is the difference between?
What is the difference between Svenska and Svensk?
I believe "svenska" refers to the Swedish language, and "svensk" refers to a Swedish person.
"Jag talar inte svenska" talks about the language.
"Han är svenk" talks about a person.
So basicly "svensk" is an adjective and "svenska" is a language.
But adjectives can get an -a sometimes.
En svensk skog. Den svenska skogen. Ett svenskt hus. Det svenska huset.
In addition, the noun svenska can also refer to a Swedish woman specifically.