i18n.getUILanguage()

Gets the UI language of the browser. This is different from i18n.getAcceptLanguages which returns the preferred user languages.

Syntax

browser.i18n.getUILanguage()

Parameters

None.

Return value

string. The browser UI language code as an i18n.LanguageCode.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxOperaFirefox for Android
getUILanguageChrome Full support 35Edge Full support 14Firefox Full support 47
Notes
Full support 47
Notes
Notes Firefox 55 and earlier returns a language tag that's seperated with the underscore character instead of hyphen, see bug 1374552.
Opera Full support YesFirefox Android Full support 48

Legend

Full support  
Full support
See implementation notes.
See implementation notes.

Examples

var uiLanguage = browser.i18n.getUILanguage();
console.log(uiLanguage);

//e.g. "fr"
Acknowledgements

This API is based on Chromium's chrome.i18n API. This documentation is derived from i18n.json in the Chromium code.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.