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SpeechSynthesisUtterance.lang

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	Status	Comment
Web Speech API The definition of 'lang' in that specification.	Draft

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	33	Yes	49	No	21	7

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	4.4.3	33	Yes	62 62 61 — 62 Disabled Disabled From version 61 until version 62 (exclusive): this feature is behind the `media.webspeech.synth.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	No	7.1	?

SpeechSynthesisUtterance.lang

Syntax

Value

Examples

Specifications

Browser compatibilityUpdate compatibility data on GitHub

See also