# E04049 — EmailTemplateLanguageRequired

This template requires every send to name a language.

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

## What to do

This template is set to require an explicit language, so a send that names none is rejected rather than served the default. Name one of the languages the template offers. A broadcast cannot name a language, so a template with this setting cannot be broadcast.

## 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`