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What is the correct way to pluralize an acronym?
I was in Middlesbrough yesterday and spotted:
CJ’s Cafe
So far, so good, I thought. A selection of the delights within were listed:
Pizzas Parmo’s Breakfasts
The second, on the face of it, looks like a standard greengrocer’s apostrophe, surprising in a sign where everything else is correct.
But parmo is an abbreviation for parmesan.
Is it correct to use an apostrophe there to indicate missing letters? Or would one normally expect to see parmos?
When forming other words from parmesan one would write parmesanish or parmesany. Would one then write parmoish and parmoey or parmo’ish and parmo’y?