JavaScript - detect languages used by user

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In this article, we'll show you how to detect user language preferences using JavaScript.

Browser API provides information about the languages that are mostly used by the user.

1. `navigator.languages` property

navigator.languages property returns languages ordered by usage (starting from mostly used).

// ONLINE-RUNNER:browser;

const languages = navigator.languages;

console.log(languages);

Note: returned language codes uses ISO 639-1: 2002.

To get only one most frequently used language you can use navigator.language property.

// ONLINE-RUNNER:browser;

const language = navigator.language;

console.log(language);