How to set the HTML lang attribute in Next.js?

How to set the HTML lang attribute in Next.js?

What is HTML lang Attribute?

The HTML lang attribute is used to identify the language of the content on the web and, when you've got an international audience say for example Spanish and English, it helps search engines return language-specific results for Spanish or English screen readers to provide correct pronunciation.

the lang attribute in Next.js

Here's what lang attribute looks like in HTML,

<html lang="en">
  <!-- Head and Body -->

You can't just simply set the lang attribute by changing the HTML tag in Next.js.

To set the lang attribute to the HTML tag in Next.js. We have to add the i18n object in the next.config.js.

Here's how it must be done,

module.exports = {
  i18n: {
    locales: ["en"],
    defaultLocale: "en",
  reactStrictMode: true,

Let's understand the properties of the i18ni n above snippet,

  • locale: It is the array of the locales values that you want to add support to the website. For example, you can set the value to es for the Spanish language.
locales: ["es"]
  • defaultLocale: It defines the default locale to be used on different pages.

After updating next.config.js, restart the server. Your final source code will have the lang="en" attribute in html tag.

<html lang="en"></html>

Check out the full list of Language codes


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