SwiftUI NavigationStack "Back" Localization

As this post says, there is no known way of getting the automatic translation if your app is not localised to that language.

That said, whether or not your app is "localised to that language" is not determined by the Localizable.strings files you have. Technically, you can add as many localisations as you want in your project settings, without localising a single file. Though, of course, I don't recommend doing this:

To use your own translated text for the buttons, you can just make your own custom back button in a way that is very similar to the system one.

Here is an example:

struct ContentView: View {

    var body: some View {
        NavigationStack {
            NavigationLink("Navigate") {
                Destination()
            }
        }
    }
}

struct Destination: View {
    @Environment(\.dismiss) var dismiss
    
    var body: some View {
        Text("This is the destination")
            .navigationBarBackButtonHidden()
            .toolbar {
                ToolbarItem(placement: .navigation) {
                    Button {
                        dismiss()
                    } label: {
                        HStack {
                            Image(systemName: "chevron.left")
                                .flipsForRightToLeftLayoutDirection(true)

                            // this is the localised string key that you will use in Localizable.strings
                            Text("Back")
                        }
                    }
                }
            }
    }
}