Simple i18n with node.js and express.js

i18n.coffee

exports.I18n = 
  en:
    title: "Free YouTube video download"
    navi:
      home: "Home"
      howto: "Tutorial"
      blog: "Blog"
      termsofuse: "Terms of Use"
      support: "Support"
      imprint: "Imprint"
  de:
    title: "Kostenloser YouTube Video Download"
    navi:
      home: "Home"
      howto: "Anleitung"
      blog: "Blog"
      termsofuse: "AGB"
      support: "Support"
      imprint: "Impressum"      

server.coffee

express = require 'express'
app = express.createServer()
i18n = require('./i18n').I18n

# Configure App Server
app.configure ->
  app.use express.cookieDecoder()
  app.use express.session()

  # Custom middleware
  app.use (req, res, next) ->
    req.lang = i18n[req.session.lang]
    next()

  # Other stuff
  app.use express.methodOverride()
  app.use express.bodyDecoder()
  app.use app.router
  app.use express.logger()
  null

app.configure 'development', ->
  app.use express.errorHandler {
    dumpExceptions: true, 
    showStack: true 
  }
  null

app.configure 'production', ->
  app.use express.errorHandler()
  null
    
# Routes
app.get "/", (req, res) ->
  res.render 'index.jade', {
    locals: { title: req.lang.title }
  }
  null

app.listen 3000