Cli-Account-Switcher

Add or update language support in a WinUI 3 app that uses .resw localization, ApplicationLanguages.PrimaryLanguageOverride, LocalizationService, ApplicationSettingsService language normalization, and a SettingsPage language ComboBox. Use when adding languages such as ja-JP, zh-Hans, zh-Hant, or other BCP-47 tags to this repository or a similarly structured WinUI RESW project.