Accepts a map keyed by RFC 4647 basic language ranges (a subtag sequence or the standalone *) with values
uniformly scalar or uniformly singleton-tuple string. A Locales carries no Selection; filtering by
localised text attaches at the enclosing collection's Selection through an Expression, not on the map.
Checks if a value is a Locales template.
Accepts a map keyed by RFC 4647 basic language ranges (a subtag sequence or the standalone
*) with values uniformly scalar or uniformly singleton-tuple string. ALocalescarries no Selection; filtering by localised text attaches at the enclosing collection'sSelectionthrough an Expression, not on the map.