Comment 4 for bug 872760

As the reporter has mentioned, the problem is not with the subcategory name, but with the category displayed below the game tile on the main screen, as Role-playing is displayed there instead of Role playing (note the separating character: '-' vs ' '). See the screenshot showing the Role-Playing string (although untranslated, but it should give you an idea where you can see the untranslated string)