A question about how to create a multilingual site using the Slim Framework was posted to the help forum the other day. Here is my take on how I would start to create an application with 3 pages: Home, About and Login.
I blogged about it at http://nesbot.com/2012/6/26/multilingual-site-using-slim
The original question http://help.slimframework.com/discussions/questions/244-multilingual-site-with-slim