index.md

---

title: i18n.LanguageCode
slug: Mozilla/Add-ons/WebExtensions/API/i18n/LanguageCode
page-type: webextension-api-type
tags:
  - API
  - Add-ons
  - Extensions
  - LanguageCode
  - Non-standard
  - Reference
  - Type
  - WebExtensions
  - i18n
browser-compat: webextensions.api.i18n.LanguageCode

---

{{AddonSidebar()}}

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

Type

Values of this type are strings.

Browser compatibility

{{Compat}}

{{WebExtExamples}}

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