When I test a GET API which retrieve a person information including his name in Arabic observed that Arabic name is not displaying properly. it is showing some junk charaters. whereas it is properly displaying in other tools(postman & soap UI).
As I reported in the following post, I think Katalon Studio has a problem:
Katalon Studio does not respect the charset expressed by the HTTP Response Header Content-type text/html, charset=UTF-8 . It seems rendering the response body with the System’s default charset.