Provides information about locale-specific information including: - language, - currency, - numeric formats, and - data/time formats. A locale is identified by a _locale tag_, as specified by IETF [BCP 47][], which contains: - a required _language code_, for example `en`, `es`, or `ca`, - an optional _script code_, for example, `Latn`, or `Cyrl`, - an optional country or _region code_, for example, `AU`, `MX`, or `ES`, and - optionally, one or more _variant_ values, and - optionally, ...