Why use a foreign word in place of "stew" then? Make it sound more fancy or legit? What if the person you're talking to doesn't know what a fucking goulash is?

We're gatekeeping in this here post. Why don't you call all your sandwiches pannini? Neither makes sense to swap the words out unless you're actually making a dish from said region with most if not all of the ingredients that make it said dish.

There is no dish of theseus with whateverthefuck ingredients and is still that. Most of the issues people seem to have (myself included) is if you call a stew with stuff Goulash but there's nothing more in common with your stew and an actual dish called goulash then it's not a fucking goulash.

Which funnily enough in Hungarian was originally a soup dish. What evolved into what you called goulash was/is called Pörkölt in Hungary. It's the other countries around that mis-adopted the name goulash for the stew and not the soup. So now it's kinda sorta both but not really.

So in short, naming things what they are and or what they contain matters.