URL Rewrite in DotNetNuke remove chunk of address (and read cookie?)

I am working on a DotNetNuke application using the iFinity URL Master module. (that may be irrelevant, as a solution may be platform independent)

What I have is a site with addresses based on language. so www.thesite.com/en/products/towels/redtowel is the english version and www.thesite.com/de/product开发者_StackOverflow社区s/towels/redtowel is the german version.

What I need to do is allow a user (who has already visited the site and set a cookie with their language) to be able to go to www.thesite.com/products/towels/redtowel and get to www.thesite.com/en/products/towels/redtowel if their cookie is set to english, and /de/products/towels/redtowel if it is set to german.

How would I do this?

if it was me and i didnt want to spend a lot of time programming I would look at something like this

http://www.snowcovered.com/snowcovered2/Default.aspx?tabid=242&PackageID=10059

then it could do a redirect based on the cookie - otherwise with iFinity I think you can do that sort of but not exactly. (I may be wrong on that - not a fan of iFinity url rewriter)