Determines if the specified locale is installed or supported on the operating system
#include <WinAPILocale.au3>
_WinAPI_IsValidLocale ( $iLCID [, $iFlag = 0] )
| $iLCID | The locale identifier (LCID) that specifies the locale or one of the following predefined values. $LOCALE_INVARIANT $LOCALE_SYSTEM_DEFAULT $LOCALE_USER_DEFAULT Windows Vista or later $LOCALE_CUSTOM_DEFAULT $LOCALE_CUSTOM_UI_DEFAULT $LOCALE_CUSTOM_UNSPECIFIED |
| $iFlag | [optional] Flag specifying the validity test to apply to the locale identifier. This parameter can have one of the following values. $LCID_INSTALLED $LCID_SUPPORTED |
| True: | the locale identifier passes the specified validity test. |
| False: | the locale identifier is invalid. |
Search IsValidLocale in MSDN Library.