Don't worry about the button names and just focus on how games usually use them. Xbox is more of an american system: accept button is on the bottom, cancel to the right of that. Switch is obviously more of a Japanese layout: accept button is on the right and cancel is on the bottom.
The top and left buttons usually still perform in similar ways across all games. The top button is usually like a menu button, enter in and out of cars button, that kind of thing. While the left button doesn't have a usual m.o. u can still difference it from the others simply by not having a standard action.
That's how I think about it. Not sure if that helps at all but there you go.