---
title: "Set Translation Languages Endpoint"
method: POST
path: "/api/voice/translation/{call_id}/languages"
tags: ["voice-control", "voice-control"]
---

# Set Translation Languages Endpoint

`POST /api/voice/translation/{call_id}/languages`

## Request

- Base URL: `https://api.dialogbrain.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.dialogbrain.com/api/voice/translation/{call_id}/languages`
- Auth: none declared

Multi-language Meet translator: set the primary spoken language and/or
the extra app-only language list mid-call. The cap (MAX_APP_TARGET_LANGS)
is enforced HERE (and in the MCP tool), not only in UI copy — both are
LLM-/operator-driven. Live-added languages translate NEW utterances only
(no backfill).

## Path parameters

- `call_id` string, required

## Request body

- TranslationLanguagesRequest
  - `primary` string, nullable
  - `app_langs` string[], nullable

## Response `200`

Successful Response

- TranslationRuntimeState
  - `paused` boolean
  - `tts_muted` boolean
  - `call_tts_muted` boolean
  - `transcription_paused` boolean
  - `agent_disabled` boolean
  - `target_lang_override` string, nullable
  - `state` string, nullable
  - `configured_state` string, nullable
  - `suppressed_by` string, nullable
  - `speaks` boolean, nullable
  - `run_mt` boolean, nullable
  - `show_subtitle` boolean, nullable
  - `play_tts` boolean, nullable
  - `armed_by` string, nullable
  - `agent_session_active` boolean
  - `app_target_langs` string[], nullable

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/dialogbrain/apis/dialogbrain-v2-api-gateway.md) · [All operations](https://skmtc.dev/dialogbrain/apis/dialogbrain-v2-api-gateway/llms.txt) · [OpenAPI document](https://skmtc.dev/dialogbrain/apis/dialogbrain-v2-api-gateway/revisions/77bef09a9209?raw)