How well do you know your Yiddish?

I got 15/15 and I only know Yiddish from hearing elder family members.
Though now I'm learning using Duolingo. Interesting sidenote: I learned
Leonard Nimoy (Spock), spoke fluent Yiddish as a child growing up
in West End of Boston.

My results:

I flunked out. But I've lived my life in environments that don't heed such as Yiddish.