This is funny cause well into 2000s she wrote her crime book that includes a Polish character named Lechsinka (not a Polish name), who didn't understand the word "detective", which is "detektyw" in Polish. By then, she had all the resources in the world. What's the excuse here?
you know, “Cho Chang” etc gets a lot easier to understand when you remember Rowling was writing in the NINETIES in SCOTLAND. There was no internet to look this kind of thing up and no Koreans or Chinese to personally ask. People really do not remember pre-internet life