Ok, because here I just gave you a sample using the single quote. But the same happens with double quotes, exclamation points, question marks, semicolons, and commas. We like the Nirmal font for the letters, but not for the punctuation. So after preparing documents, we change the punctuation to Times New Roman. But the find and replace only changes half the occurrences for any of these, which leaves me to find and change the rest by hand. A big job!

And as you noted, it is even worse with Mangal. With Nirmal font, at least the find tool finds them although it only replaces half. But with Mangal, the find tool doesn't even find them.