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Instance PropertyFoundationEssentials

maximalIdentifier

iOS 16.0+ iPadOS 16.0+ Mac Catalyst 16.0+ macOS 13.0+ tvOS 16.0+ watchOS 9.0+
Returns a BCP-47 identifier that always includes the script: “zh-Hant-TW”, “en-Latn-US”
var maximalIdentifier: String { get }