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next.js/errors/invalid-i18n-config.mdx
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---
title: Invalid i18n config
---
## Why This Error Occurred
In your `next.config.js` file, you provided an invalid config for the `i18n` field. This could mean the limit for 100 locale items was exceeded.
## Possible Ways to Fix It
Make sure your `i18n` field follows the allowed config shape, limits, and values:
```js filename="next.config.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](/docs/pages/guides/internationalization)