Yeah, I still think the people who came up with that idea should get some talking to done. As that idea is incredibly stupid.
Why did they do that? Basically the only thing I can figure out is that they did to avoid spoilers.
Even that's not a very good reason because most people simply trying to autotranslate "Thok Ast Thok (Hard)" will almost certainly end up displaying "Thok Ast Thok (Extreme)" in the listing as well