# Invalid i18n config

#### Why This Error

In your `next.config.js` file you provided an invalid config for the `i18n` field.

#### Possible Ways to Fix It

Make sure your `i18n` field follows the allowed config shape and values:

```js
module.exports = {
  i18n: {
    // These are all the locales you want to support in
    // your application
    locales: ['en-US', 'es', 'fr', 'nl-NL'],
    // This is the default locale you want to be used when visiting
    // a non-locale prefixed path e.g. `/hello`
    defaultLocale: 'en-US',
    // This is a list of locale domains and the default locale they
    // should handle (these are only required when setting up domain routing)
    domains: [
      {
        domain: 'example.com',
        defaultLocale: 'en-US',
        // other locales that should be handled on this domain
        locales: ['es'],
      },
      {
        domain: 'example.nl',
        defaultLocale: 'nl-NL',
      },
      {
        domain: 'example.fr',
        defaultLocale: 'fr',
      },
    ],
  },
}
```

### Useful Links

- [Internationalized Routing Documentation](https://nextjs.org/docs/advanced-features/i18n-routing)
