Windows Vista and later: Preferred locale to use for console display. The maximum number of characters allowed for this string is 85, including a terminating null character.
If the language corresponding to this locale is supported in the console, the value is the same as that for LOCALE_SNAME, that is, the locale itself can be used for console display. However, the console cannot display languages that can be rendered only with Uniscribe. For example, the console cannot display Arabic or the various Indic languages. Therefore, the LOCALE_SCONSOLEFALLBACKNAME value for locales corresponding to these languages is different from the value for LOCALE_SNAME.
For predefined locales, if the fallback value is different from the value for the locale itself, the value for the neutral locale is used. A specific locale is associated with both a language and a country/region, while a neutral locale is associated with a language but is not associated with any country/region. For example, ar-SA falls back to "en", not to "en-US". This policy of using neutral locales is implemented consistently for predefined locales and is strongly recommended for custom locales. However, the policy is not enforced. For a custom locale, your application can use a specific locale instead of a neutral locale as a fallback.