Incorrect Korean that you’ll hear at restaurants (Honorifics) | Korean FAQ
A lot of Korean is incorrect, just as there are many English mistakes used commonly in English speaking countries. But that doesn't always make them necessarily wrong. Some "incorrect" Korean is used commonly in restaurants, in order to make the Korean sound extra polite - even more polite than is necessary. There are some specific grammar forms you'll hear more often in restaurants, and I'll show you what these mean and why they're technically incorrect... but I'll also show you how they can also be right.