HTML: Markup language
CSS: Styling language
#"/en-US/docs/Web/JavaScript/Reference/Global_Objects" data-glean-id="menu_click_submenu: javascript -> /en-US/docs/Web/JavaScript/Reference/Global_Objects" >Standard built-in objects
Web APIs: Programming interfaces
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Alanguage tag such as"en-US" or"fr".
"en-US"
"fr"
Values of this type are strings.
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Note:This API is based on Chromium'schrome.i18n API. This documentation is derived fromi18n.json in the Chromium code.
chrome.i18n
i18n.json
This page was last modified onJul 17, 2025 byMDN contributors.
detectLanguage()
getAcceptLanguages()
getMessage()
getPreferredSystemLanguages()
getSystemUILanguage()
getUILanguage()
LanguageCode
action
author
background
browser_action
browser_specific_settings
chrome_settings_overrides
chrome_url_overrides
commands
content_scripts
content_security_policy
declarative_net_request
default_locale
description
developer
devtools_page
dictionaries
externally_connectable
homepage_url
host_permissions
icons
incognito
manifest_version
name
offline_enabled
omnibox
optional_host_permissions
optional_permissions
options_page
options_ui
page_action
permissions
protocol_handlers
short_name
sidebar_action
storage
theme
theme_experiment
user_scripts
version
version_name
web_accessible_resources