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Localization on iOS

Assistive technologies, such as the screen reader, use the locale for the pronunciation of utterances. It is important to explictly set a locale for your app. An incorrect locale leads to unclear pronunciation. Also, setting a locale can help with displaying characters correctly.

On iOS, you can set the locale of an app via the CFBundleDevelopmentRegion property. We suggest using Base internationalization to separate user-facing strings from .storyboard and .xib files. You can load a specific Bundle to load assets in the desired language.

For more information, see Adding Support for Languages and Regions.

extension String {
    func localized(_ language: String) -> String {
        guard let path = Bundle.main.path(forResource: language, ofType: "lproj"),
              let bundle = Bundle(path: path) else {
          return localized(Bundle.main)
        return NSLocalizedString(self, tableName: nil, bundle: bundle, value: "", comment: "")


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