# POST /v1/dubbing/project/{project_id}/language (ElevenLabs API)
Base URL: https://api.elevenlabs.io
Auth: xi-api-key: <ELEVENLABS_API_KEY>
Last verified: 2026-09-03

> Create Dubbing Language Target

## Critical Gotchas
* Authentication uses the non-standard `xi-api-key` header, not `Authorization: Bearer`. Sending a Bearer token returns HTTP 401.
* Text-to-speech responses are raw binary audio, not JSON. Write the body to a file (`--output speech.mp3`) rather than parsing it.

## cURL
curl -X POST 'https://api.elevenlabs.io/v1/dubbing/project/project-id/language' \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"target_language":"string","voice_settings":{"cloning_strength":7},"translations":{}}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| project_id | path | string | Yes | Identifier of the parent dubbing proj... |
| target_language | body | string | Yes | BCP-47 language tag to dub the projec... |
| voice_settings | body | object | No | Voice settings applied to every speak... |

## Response (200 OK)
{"language_id":"string","project_id":"string"}

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