ASP Dynamic includes & Multi Language woes

Hello all,
I know its not possible to include files dynamiclly using asp so i am hoping someone here can provide a work around.

I am looking to create a multi language site, now when the user logs in a session variable is created that stores their language preferences.

What i would like to do is store the text for the site in either a text file or an include.

I was planning on using constant variables for the text area so for a specific text area all i would have to write would be

etc.
I know it is possible to include files dynamically using the FSO but i believe that i cannot process server side script using the FSO method!!
ARRRGGHH
Ok so how can i get around it without using php
Any help would be appreciated