Cherrybim, that wasn’t meant as an insult to Rav Dovid Cohen Shlit”a.People, when challenged for a source to the mitzvah of Yiddish in that thread, couldn’t come up with anything more solid than “Rav Dovid Cohen wrote a book” and something related to “hoisen”. Nobody seemed to have read the book or known anything about it other than a vague phrase. I meant it that someone should please read his book and tell me what his sources were, since nobody came up with any real sources. I NEVER meant to say he wasn’t a real poseik, chas veshalom. I meant that he WAS a real poseik, and would undoubtedly have sources if he actually meant to pasken it was holy, which I doubted.
Further iyun has revealed that he wrote a book on divrei aggada, and mentioned lashon hakodesh sources for Yiddish phrases. He NEVER paskened that it was holy, and one gets a mitzvah for speaking it, unless I’m completely mistaken. I have been trying to get hold of that book to double-check but have not found anyone who owns it. If you can post translations from his hakdamah I would be very grateful. I want to be sure that he didn’t pasken it was actually holy.
I do believe Yiddish is holy when it’s sung by Lipa 🙂