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 RFC 5646: Tags for Identifying Languages (also known as 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

BCD tables only load in the browser

See also