Optional. String that specifies the localization code. If you want to use the current locale, leave it blank. If not blank, ...

Optional. String that specifies the localization code. If you want to use the current locale, leave it blank. If not blank, this parameter must be a string that indicates the desired locale in which information should be retrieved. For Microsoft locale identifiers, the format of the string is 'MS_xxxx', where xxxx is a string in hexadecimal form that indicates the LCID. For example, American English would appear as 'MS_409'