A language tag such as "en-US" or "fr".


Values of this type are strings.

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxOperaFirefox for Android
LanguageCodeChrome Full support 47Edge Full support 14Firefox Full support 45Opera Full support 34Firefox Android Full support 48


Full support  
Full support

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.

Document Tags and Contributors

Contributors to this page: mdnwebdocs-bot, wbamberg
Last updated by: mdnwebdocs-bot,