There is a fellow in the mir who made it his job to teach yiddish t the uneducated masses. He has done this by writing a book, generally writing signs in yiddish.
This week he put up a d’var toira explaining why klal yisroel “oisgehert” moishe rabbeinu. The only problem is that k’lal yisroel “tzu herred” mosihe, not oisgehheret.
It’s a pity people don’t learn things before teaching them.