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snippets/js/s/detect-language.md

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+---
+title: Detect language
+type: snippet
+language: javascript
+tags: [browser]
+cover: accessibility
+dateModified: 2020-10-06T18:47:16+03:00
+---
+
+Detects the preferred language of the current user.
+
+- Use `Navigator.language` or the first value of `Navigator.languages` if available, otherwise return `defaultLang`.
+- Omit the second argument, `defaultLang`, to use `'en-US'` as the default language code.
+
+```js
+const detectLanguage = (defaultLang = 'en-US') =>
+  navigator.language ||
+  (Array.isArray(navigator.languages) && navigator.languages[0]) ||
+  defaultLang;
+```
+
+```js
+detectLanguage(); // 'nl-NL'
+```