NavigationLanguageChangeObserver
public protocol NavigationLanguageChangeObserver : ObserverDeclares an observer that can receive the language update events.
The navigation language is changed when TomTomNavigation.preferredLanguage is set and the route is
successfully updated.
To add a NavigationLanguageChangeObserver, use addLanguageChangeObserver(_:).
To stop receiving these events, remove the observer using removeLanguageChangeObserver(_:).
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                  Notifies that the TomTomNavigation.languagehas changed.DeclarationSwift func didChangeLanguage(language: Locale)ParameterslanguageThe new language. 
 
         TomTom SDK for iOS (0.53.1)
 
          TomTom SDK for iOS (0.53.1)
         NavigationLanguageChangeObserver
          NavigationLanguageChangeObserver