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fastify-request-language v2.0.0

A middleware to attach language to request by parsing Accept-Language header


Build Status XO code style

Adds language to the Fastify request object by parsing Accept-Language HTTP Header.


  • Node >= 12
  • fastify >= 3


npm install fastify-request-language


const fastify = require('fastify')({
    logger: true,
    trustProxy: true,

fastify.register(require('fastify-request-language'), {
    languages: ['en', 'hi'],

// Access language in request.language
fastify.get('/', (request, reply) => {
    reply.send({ language: request.language });

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