Hi folks. I'm hoping for a little regex help here. Until the site will be adding more locales, I'd like to redirect requests the don't match ~/en or ~/admin or ~/|umbraco to the ~/en directory. The negative look-ahead approach isn't working for me. Perhaps my syntax is incorrect?

I know that Regex fundamentally is a toolset to find matches (patterns) strings and not act upon grouped character mismatches, but I thought I'd just throw this out there and see if anyone has any "production-worthy" ideas.

Any suggestions?

  <add name="foobar-redirect"
  virtualUrl= "~/(?!en|admin|umbraco).+/(.*)"
  rewriteUrlParameter="ExcludeFromClientQueryString"
  destinationUrl="~/en/$1"
  ignoreCase="true"
  redirect="Application"
  redirectMode="Temporary" />