express + i18n-node + cookieParser and avoid concurrency issues

i18n-express-cookie-app.js

// usual requirements
var express = require('express'),
    i18n = require('i18n'),
    app = module.exports = express();

i18n.configure({
  // setup some locales - other locales default to en silently
  locales: ['en', 'ru', 'de'],

  // sets a custom cookie name to parse locale settings from
  cookie: 'yourcookiename',

  // where to store json files - defaults to './locales'
  directory: __dirname + '/locales'
});

app.configure(function () {
  // you will need to use cookieParser to expose cookies to req.cookies
  app.use(express.cookieParser());

  // i18n init parses req for language headers, cookies, etc.
  app.use(i18n.init);

});

// serving homepage
app.get('/', function (req, res) {
  res.send(res.__('Hello World'));
});

// starting server
if (!module.parent) {
  app.listen(3000);
}

package.json

{
  "name": "i18n-express-cookie-example",
  "version": "0.0.0",
  "author": "Marcus Spiegel <marcus.spiegel@gmail.com>",
  "dependencies": {
    "express": "*",
    "i18n": "*"
  }
}