Navigator.language

The Navigator.language read-only property returns a string representing the preferred language of the user, usually the language of the browser UI.

Syntax

const lang = navigator.language

Value

A DOMString. lang stores a string representing the language version as defined in BCP 47. Examples of valid language codes include "en", "en-US", "fr", "fr-FR", "es-ES", etc.

Note that in Safari on iOS prior to 10.2, the country code returned is lowercase: "en-us", "fr-fr" etc.

Example

if (/^en\b/.test(navigator.language)) {
  doLangSelect(window.navigator.language);
}

Specifications

Specification
HTML Standard (HTML) # dom-navigator-language-dev

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
`language`	1	12	1 Before Firefox 4, this property's value was also part of the user agent string, as reported by `navigator.userAgent`. Starting in Firefox 5, this property's value is based on the value of the `Accept-Language` HTTP header.	11 Closest available (non-standard) properties are `userLanguage` and `browserLanguage`.	4	1	1	18	4	10.1	1	1.0