SpeechSynthesisUtterance.lang

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.

Value

A string representing a BCP 47 language tag.

Examples

const synth = window.speechSynthesis;

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

const voices = synth.getVoices();

// ...

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

  const utterThis = new SpeechSynthesisUtterance(inputTxt.value);
  const selectedOption = voiceSelect.selectedOptions[0].getAttribute('data-name');
  for (let 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

BCD tables only load in the browser

See also