Ios AVSpeechSynthesizer不能使用印地语

导入的AVFoundation，可以很好地使用英语字符串，但不能使用印地语字符串。当我将我的iPhone语言从我不想要的设置更改为印地语时，它就起作用了。如何在不将iPhone语言更改为印地语（iPhone语言为英语）的情况下使用此代码

let synth = AVSpeechSynthesizer()
var myUtterance = AVSpeechUtterance(string: "")

override func viewDidLoad() {

  Speak()
}

func speak(){
    self.myUtterance = AVSpeechUtterance(string: "ऑर्डर स्थिति अपडेट कर दी गई है")
    myUtterance.voice = AVSpeechSynthesisVoice(language: "hi-IN")
    self.synth.speak(self.myUtterance)
}

下面是我的代码：

let synth = AVSpeechSynthesizer()
var myUtterance = AVSpeechUtterance(string: "")

override func viewDidLoad() {
      myUtterance.voice = AVSpeechSynthesisVoice(language: "hi-IN")
      Speak()
}

func speak(){
       self.myUtterance = AVSpeechUtterance(string: "ऑर्डर स्थिति अपडेट कर दी गई है")
                self.synth.speak(self.myUtterance)
}

let synth = AVSpeechSynthesizer()
var myUtterance = AVSpeechUtterance(string: "")

override func viewDidLoad() {

  Speak()
}

func speak(){
    self.myUtterance = AVSpeechUtterance(string: "ऑर्डर स्थिति अपडेट कर दी गई है")
    myUtterance.voice = AVSpeechSynthesisVoice(language: "hi-IN")
    self.synth.speak(self.myUtterance)
}

---

提前谢谢你

已解决：我更改了一条线的位置及其工作状态。我将字符串设置为myoutrance后设置了语言

let synth = AVSpeechSynthesizer()
var myUtterance = AVSpeechUtterance(string: "")

override func viewDidLoad() {

  Speak()
}

func speak(){
    self.myUtterance = AVSpeechUtterance(string: "ऑर्डर स्थिति अपडेट कर दी गई है")
    myUtterance.voice = AVSpeechSynthesisVoice(language: "hi-IN")
    self.synth.speak(self.myUtterance)
}