For regular expression matching and string collation.
For regular expression matching, character classification, conversion, case-sensitive comparison, and wide character functions.
For localizable natural-language messages.
For monetary formatting.
For number formatting (such as the decimal point and the thousands separator).
For time and date formatting.
Used by interfaces Atspi.Text and Atspi.Document, this enumeration corresponds to the POSIX 'setlocale' enum values.