AccessibilitySpeechLanguage.swift

import SwiftUI

let someText = "Qu’est-ce que c’est?"

struct ContentView: View {
  let nsAttributedStringFR = NSAttributedString(
    string: someText,
    attributes: [
      .languageIdentifier: "fr-FR"
      // This appears to have no effect
      // .accessibilitySpeechIPANotation: "fr-FR",
      // .accessibilitySpeechLanguage: "fr-FR",
    ]
  )

  var attributedStringFR: AttributedString {
    var attributedString = AttributedString(someText)
    attributedString.languageIdentifier = "fr-FR"
    // This appears to have no effect
    // attributedString[AttributeScopes.AccessibilityAttributes.IPANotationAttribute.self] = "fr-FR"
    // attributedString.accessibilitySpeechPhoneticNotation = "fr-FR"
    return attributedString
  }

  var body: some View {
    VStack {
      // Speaks in the default voice language
      Text(someText)

      // Pronounced correctly in French
      Text(AttributedString(nsAttributedStringFR))

      // Pronounced correctly in French
      Text(attributedStringFR)

      // The first portion is read with the default, and the rest is correctly pronounced in French.
      Text(AttributedString(someText) + " — " + attributedStringFR)
    }
  }
}