Proud Jew: a language doesn’t get a kedusha just because tzadikim speak it. If that was the case, then many more languages would be holy – and English would top that list.
Why do you I’m “fargoyisht”? As I said, my father-in-law, who is a well known Rav, said Yiddish has no kedusha to it.
Just in case you think he’s not a “real” Rav, let me tell you about him a bit: he learned bechavrusah with R’ Shmuel Rozovsky, R’ Shach, and many others. Now, he is extremely close with R’ Shteinman, R’ Chaim Kanievsky, and R’ Elyashiv.