Accurate region detection for NAND titles

Source/Core/DiscIO/Enums.h

@@ -40,13 +40,13 @@ enum class Country
   NumberOfCountries
 };
 
-// Regions 0 - 2 and 4 match Nintendo's GameCube/Wii region numbering.
+// This numbering matches Nintendo's GameCube/Wii region numbering.
 enum class Region
 {
   NTSC_J = 0,   // Japan and Taiwan (and South Korea for GameCube only)
   NTSC_U = 1,   // Mainly North America
   PAL = 2,      // Mainly Europe and Oceania
-  Unknown = 3,  // 3 seems to be unused? Anyway, we need an Unknown entry. Let's put it here
+  Unknown = 3,  // Nintendo uses this to mean region free, but we also use it for unknown regions
   NTSC_K = 4    // South Korea (Wii only)
 };
 
@@ -62,8 +62,8 @@ enum class Language
   Spanish = 4,
   Italian = 5,
   Dutch = 6,
-  SimplifiedChinese = 7,
-  TraditionalChinese = 8,
+  SimplifiedChinese = 7,   // Not selectable on any unmodded retail Wii
+  TraditionalChinese = 8,  // Not selectable on any unmodded retail Wii
   Korean = 9,
   Unknown
 };