SpeechSynthesisUtterance.lang

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The lang property of the SpeechSynthesisUtterance interface gets and sets the language of the utterance.

If unset, the app's (i.e. the <html> lang value) lang will be used, or the user-agent default if that is unset too.

Syntax

var myLang = speechSynthesisUtteranceInstance.lang;
speechSynthesisUtteranceInstance.lang = 'en-US';

Value

A DOMString representing a BCP 47 language tag.

Examples

var synth = window.speechSynthesis;

var inputForm = document.querySelector('form');
var inputTxt = document.querySelector('input');
var voiceSelect = document.querySelector('select');

var voices = synth.getVoices();

  ...

inputForm.onsubmit = function(event) {
  event.preventDefault();

  var utterThis = new SpeechSynthesisUtterance(inputTxt.value);
  var selectedOption = voiceSelect.selectedOptions[0].getAttribute('data-name');
  for(i = 0; i < voices.length ; i++) {
    if(voices[i].name === selectedOption) {
      utterThis.voice = voices[i];
    }
  }
  utterThis.lang = 'en-US';
  synth.speak(utterThis);
  inputTxt.blur();
}

Specifications

Specification
Web Speech API # dom-speechsynthesisutterance-lang

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`lang`	33	14	49	No	21	7	No	33	62	No	7	3.0