Instance Property
region
iOS 16.0+
iPadOS 16.0+
Mac Catalyst 16.0+
macOS 13.0+
tvOS 16.0+
watchOS 9.0+
The region used by the locale.
Discussion
Set this property to override the region for region-related preferences, such as measuring system, calendar, and first day of the week. If unset, the locale uses the region of the language component.
This property corresponds to the rg key of the Unicode BCP 47 extension.