varnish & cookies & multilanguage

[rafailowski]

Hello,
I'm new to varnish and i have some problems with cookies.
I have to cache a website who use coookies to determine the language.

The cookies are:
15 TxHeader     b Cookie: _ZopeId="23273311A29b-he1CIg"; LOCALIZER_LANGUAGE="es"

The url used to change language on the  website is like that:
http://xxxx?lang=en
So i made this :

if (req.url ~ "=(en|es|de|fr|it|pt|pl|ru|el|ko|zh-CN|zh|ja|ar)$"){
    pipe;
}
But it didn't solve the problem.

The only way i found is :
if (req.http.Cookie ~ "LOCALIZER_LANGUAGE") {
    pipe;
}
Adn it works fine but now, nothing is cached :(

So my question :)
Is there's a way to cache a website like this, using cookies for language?

Thx in advance,
rafailowski