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

# Detect language from Accept-Language header

> Detects the preferred language from the browser's Accept-Language header.



## OpenAPI

````yaml https://api.loyalty.dog/openapi.json get /v2/localization/detect-language
openapi: 3.1.0
info:
  title: LoyaltyDog
  description: >-

    Welcome to the LoyaltyDog API! This API provides access to our loyalty
    program features, allowing you to integrate with various platforms and
    manage your loyalty data.


    Want to query LoyaltyDog via an AI assistant (Claude, Cursor, Windsurf)? See
    the [MCP Integration guide](https://loyaltydog.ai/playground#mcp).
        
  termsOfService: https://loyalty.dog/loyalty-program-terms-service
  contact:
    name: LoyaltyDog Support
    url: https://loyalty.dog/contact-us
    email: support@loyalty.dog
  version: 1.0.1
servers:
  - url: https://api.loyalty.dog
    description: Production
security:
  - bearerAuth: []
paths:
  /v2/localization/detect-language:
    get:
      tags:
        - Localization
      summary: Detect language from Accept-Language header
      description: >-
        Detects the preferred language from the browser's Accept-Language
        header.
      operationId: detect_language_v2_localization_detect_language_get
      parameters:
        - name: Accept-Language
          in: header
          required: false
          schema:
            type: string
            maxLength: 200
            description: Accept-Language header from browser
            title: Accept-Language
          description: Accept-Language header from browser
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/DetectedLanguageResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
components:
  schemas:
    DetectedLanguageResponse:
      properties:
        detectedLanguage:
          type: string
          title: Detectedlanguage
        fallback:
          type: boolean
          title: Fallback
          description: True if fell back to default language
          default: false
      type: object
      required:
        - detectedLanguage
      title: DetectedLanguageResponse
      description: Response model for detected language from Accept-Language header.
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: JWT access token obtained from POST /v2/token.

````