Example of how to integrate node-i18n with a KeystoneJS app (using yo keystone generated site as a basis) - see https://github.com/mashpie/i18n-node for more docs.

keystone.js

// Simulate config options from your production environment by
// customising the .env file in your project's root folder.
require('dotenv')().load();

// Require keystone and i18n
var keystone = require('keystone'),
	i18n= require('i18n');

// Initialise Keystone with your project's configuration.
// See http://keystonejs.com/guide/config for available options
// and documentation.

keystone.init({

	'name': 'Your Site',
	'brand': 'Your Site',

	'less': 'public',
	'static': 'public',
	'favicon': 'public/favicon.ico',

	'views': 'templates/views',
	'view engine': 'jade',

	'auto update': true,

	'session': true,
	'auth': true,
	'user model': 'User',
	'cookie secret': 'your secret'

});

// Load your project's Models

keystone.import('models');

// Setup common locals for your templates. The following are required for the
// bundled templates and layouts. Any runtime locals (that should be set uniquely
// for each request) should be added to ./routes/middleware.js

keystone.set('locals', {
	_: require('underscore'),
	env: keystone.get('env'),
	utils: keystone.utils,
	editable: keystone.content.editable
});

// Configure i18n

i18n.configure({
	locales:['en', 'de'],
	directory: __dirname + '/locales'
});

// Load your project's Routes

keystone.set('routes', require('./routes'));

// Configure the navigation bar in Keystone's Admin UI

keystone.set('nav', {
	'posts': ['posts', 'post-categories'],
	'galleries': 'galleries',
	'enquiries': 'enquiries',
	'users': 'users'
});

// Start Keystone to connect to your database and initialise the web server

keystone.start();

routes - index.js

var _ = require('underscore'),
	keystone = require('keystone'),
	i18n = require("i18n"),
	middleware = require('./middleware'),
	importRoutes = keystone.importer(__dirname);

// Add-in i18n support
keystone.pre('routes', i18n.init);

// Common Middleware
keystone.pre('routes', middleware.initLocals);
keystone.pre('render', middleware.flashMessages);

// Import Route Controllers
var routes = {
	views: importRoutes('./views')
};

// Setup Route Bindings
exports = module.exports = function(app) {
	
	// Views
	app.get('/', routes.views.index);
	app.get('/blog/:category?', routes.views.blog);
	app.get('/blog/post/:post', routes.views.post);
	app.get('/gallery', routes.views.gallery);
	app.all('/contact', routes.views.contact);

}