next.config.js

/** @type {import('next').NextConfig} */
const nextConfig = {
  reactStrictMode: true, // Recommended for the `pages` directory, default in `app`.
  swcMinify: true,
  experimental: {
    // Required:
    appDir: true,
    // forceSwcTransforms: true,
  },
  i18n: {
    // These are all the locales you want to support in
    // your application
    locales: ["en-US", "es"],
    // This is the default locale you want to be used when visiting
    // a non-locale prefixed path e.g. `/hello`
    defaultLocale: "es",
    // This is a list of locale domains and the default locale they
    // should handle (these are only required when setting up domain routing)
    // Note: subdomains must be included in the domain value to be matched e.g. "fr.example.com".
    domains: [
      {
        domain: "example.com",
        defaultLocale: "en-US",
        // an optional http field can also be used to test
        // locale domains locally with http instead of https
        http: true,
      },
    ],
  },
};

module.exports = nextConfig;