# E04047 — EmailTemplateDefaultLanguageRequired

The default language has to be one of the languages the template has.

- **HTTP status**: `422`
- **Type**: `validation_error`
- **Name**: `EmailTemplateDefaultLanguageRequired`

## What to do

Set the default language to a language the template already has, or add content for the language you want to make the default. The same rule applies when you remove a language. The current default cannot be removed on its own, so point the default at a different language first, then remove the old one.

## Related

- [E04xxx — Email sending & delivery](/docs/api/errors/E04xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`

## Related resources

- [Should I use a Bird SDK or call the API directly?](/explained/platform/should-i-use-an-sdk-or-call-the-api-directly) (answer)
- [Build your first integration](/learn/paths/integration) (course)
- [Send your first email](/docs/get-started/send-your-first-email) (docs)

[Get an implementation brief](/learn/workspace?topic=api-basics)