In the 1950s , the two Gdolim were vacationing in Tzfat. The Gerrer rebbe בית ישראל and the Vizhnitzer אמרי חיים. They were friends.
A Zionist personality passed by, hearing, the two Rebbes spoke in Yiddish, he began chastising them and preaching about LoshonHaKodesh…
The Gerrer asked the Viznitzer to reply, because, he explained, if I will answer, there will be “fire,” meaning it will come out too strong…fireworks..
So the Viznitzer אמרי חיים spoke, to the affect:
What is “Lashon HaKodesh”? Hebrew? You have tons of Nivul-Peh, etc. Printed daily I (secular) newspapers? Is this Kodesh?
However, a CLEAN Yiddish is Loshon ha Kodesh, holy tongue…
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Moral of the story, of course, Hebrew spoken as a Frum yid does, is Kodesh.
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BTW, there are certain errors Ben Yehuda made in Hebrew. In additional, there are sometimes confusions for those seeking true meaning of words, when self-taught not-in-a-Yeshiva by Hebrew speakers