Navigator: language property
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Thelanguage read-only property of theNavigator interface returns a string representing the preferred language of the user, usually the language of the browser UI.
Value
A string representing the language version inBCP 47 language tag format. Examples of valid language tags includeen,en-US,fr,fr-FR,es-ES, etc.
Note that in Safari on iOS prior to 10.2, the country code returned is lowercase: "en-us", "fr-fr" etc.
Examples
Using Intl constructors to do language-specific formatting
TheIntl constructors allow formatting content to match the rules of a given locale. You can passnavigator.language to them to format content in the locale corresponding to the user's preferred language:
const date = new Date("2012-05-24");const formattedDate = new Intl.DateTimeFormat(navigator.language).format(date);Specifications
| Specification |
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| HTML # dom-navigator-language-dev |