routes/i18n.js
var app = require('..')
app.get(__l('/change-lang/:lang'), function (req, res, next) {
req.setLocale(req.params.lang)
res.cookie('i18nlang', req.params.lang, { maxAge: 900000, httpOnly: true })
if (req.query.returnTo) {
res.redirect(req.query.returnTo)
} else {
res.redirect('/')
}
})