Function out there to identify pseudo-empty fields, e.g. "n/a", "--", etc?

Hi all

Just wondering if anyone has come across a function which can identify
typical user-inputted placeholder values?

English language is my scope so typical examples would be "not
applicable", "n/a", "na", "none", "--", etc.

I know it would be trivial to create but no sense in reinventing the wheel.

Kind regards

Peter

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