Please state in which country your phrase tends to be used, what the phrase is, and what it should be.
Example:
In America, recently came across “back-petal”, instead of back-pedal. Also, still hearing “for all intensive purposes” instead of “for all intents and purposes”.
So this brings up an interesting question: when or when not to point people’s error to them. I’d hate to think that someone would keep repeating their error simply because they’ve never been told the correct way.
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I see. It sounds like it’s deeply ingrained then. I think you’ve more than done your job and it’s all you can do.