Functions to internationalize your extension. You can use these APIs to get localized strings from locale files packaged with your extension, find out the browser’s current language, and find out the value of its Accept-Language header.

See the Internationalization page for a guide on using this API.

Types

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

Functions

• : Detects the language of the provided text using the Compact Language Detector.

• : Gets the localized string for the specified message.

• : Gets the accept-languages of the browser. This is different from the locale used by the browser. To get the locale, use .

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

• : Returns the preferred locales of the operating system.

• : Returns the current UI locale of the operating system.

Browser compatibility

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

See also

• Internationalization: a guide to using the WebExtension i18n system.

• Locale-Specific Message reference: extensions supply locale-specific strings in files called messages.json. This page describes the format of messages.json.