To get polyglot to work, i setup a piece of middleware that would detect the locale of the user, that locale will then load translations into polyglot via redis (still on the server-side). Once it's attached on the server side you can attach polyglot to the app object in the app/app.js, and finally posted to the client via the bootstrapped data on the app object.
Let me know if you have any specific questions on how to setup any of those portions.
Josh