> ## Documentation Index
> Fetch the complete documentation index at: https://dialnexa.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# List Voice Languages

> List the languages supported by one voice.

<span data-api-safety-label="read-only"><Badge color="gray" size="sm" shape="pill">Read only</Badge></span>

<Info>
  **Recommended.** This endpoint is part of the public `/v1` API reference and is the supported path for new integrations. See the [migration guide](/docs/api-reference/v1/migrating-to-v1) for versioning guidance.
</Info>

Returns the language choices supported by one voice. Use this endpoint when a voice picker needs to show per-voice language options before saving an agent.

## When to use this

* **Voice pickers**: after the user selects a voice, show only the languages that voice actually supports.
* **Pre-save validation**: confirm the `language_id` you are about to set on an agent is supported by its `voice_id`, so [Create Agent](/docs/api-reference/v1/agents/create) or [Update Agent](/docs/api-reference/v1/agents/update) does not fail validation.
* **Multilingual rollouts**: check whether one voice can cover all your target languages or whether you need a different voice per market.

## Path parameters

| Parameter | Description |
| --------- | ----------- |
| `id`      | Voice ID.   |

## Related endpoints

* [Get Voice Details](/docs/api-reference/v1/voices/get): fetch one voice record.
* [List Speech To Speech Voices](/docs/api-reference/v1/voices/s2s): fetch S2S-compatible voices and language choices.
* [List Languages](/docs/api-reference/v1/languages/list): fetch the platform language catalog.


## OpenAPI

````yaml GET /v1/voices/{id}/languages
openapi: 3.0.0
info:
  title: DialNexa API
  description: >-
    Public REST API for the DialNexa voice AI platform. Versioned endpoints are
    under /v1; unversioned endpoints are legacy and deprecated.
  version: 1.0.0
servers:
  - url: https://api.dialnexa.com
    description: DialNexa production API
security:
  - bearer: []
tags:
  - name: API Keys
  - name: Agent Functions
  - name: Agents V1
  - name: Agents2
  - name: Batch Calls
  - name: Batch Calls V1
  - name: Call Logs
  - name: Calls
  - name: Calls V1
  - name: Campaign Leads
  - name: Campaigns
  - name: External Webhooks
  - name: Knowledge Base
  - name: Knowledge Base V1
  - name: LLMs
  - name: LLMs V1
  - name: Languages
  - name: Languages V1
  - name: Organization Phone Numbers
  - name: Organization Phone Numbers V1
  - name: Phone Number Pricing
  - name: Phone Number Pricing V1
  - name: Transcribers
  - name: Transcribers V1
  - name: User Webhooks
  - name: User Webhooks V1
  - name: V1
  - name: Voices
  - name: Voices V1
  - name: Webcall
  - name: Workflow Leads
  - name: Workflow Leads V1
  - name: Workflows
  - name: Workflows V1
paths:
  /v1/voices/{id}/languages:
    get:
      tags:
        - Voices
        - Voices V1
        - V1
      summary: Get Voice Language Details
      description: Returns the languages supported by one voice.
      operationId: VoicesV1Controller_getVoiceLanguages
      parameters:
        - name: id
          required: true
          in: path
          description: Voice ID
          schema:
            example: voice_abc123
            type: string
      responses:
        '200':
          description: Voice languages returned successfully.
          content:
            application/json:
              schema:
                type: array
                items:
                  type: object
                  properties:
                    id:
                      example: lang_abc123
                      type: string
                    code:
                      type: string
                      example: en
                    name:
                      example: English
                      type: string
              examples:
                success:
                  summary: Successful response
                  value:
                    - id: lang_en_in
                      name: English (India)
                      code: en-IN
        '400':
          description: Invalid catalog ID format.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              examples:
                error:
                  summary: 400 Bad Request
                  value:
                    statusCode: 400
                    message: Invalid catalog ID format
                    error: Bad Request
        '401':
          description: Unauthorized.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              examples:
                error:
                  summary: 401 Unauthorized
                  value:
                    statusCode: 401
                    message: API key is missing or invalid
                    error: Unauthorized
        '403':
          description: Forbidden - API key does not have access to this organization.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              examples:
                error:
                  summary: 403 Forbidden
                  value:
                    statusCode: 403
                    message: You do not have permission to access this resource
                    error: Forbidden
        '404':
          description: Voice not found.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              examples:
                error:
                  summary: 404 Not Found
                  value:
                    statusCode: 404
                    message: Voice not found
                    error: Not Found
        '500':
          description: Internal server error.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
              examples:
                error:
                  summary: 500 Internal Server Error
                  value:
                    statusCode: 500
                    message: Internal server error
                    error: Internal Server Error
      security:
        - bearer: []
components:
  schemas:
    ErrorResponse:
      type: object
      properties:
        statusCode:
          type: integer
          example: 400
        message:
          oneOf:
            - type: string
            - type: array
              items:
                type: string
          example: phone_number must be a valid E.164 phone number
        error:
          type: string
          example: Bad Request
      required:
        - statusCode
        - message
        - error
  securitySchemes:
    bearer:
      scheme: bearer
      bearerFormat: JWT
      type: http

````