mod_rewrite - rewrite a URL that is already rewritten

[wickyd]

Dear forum members

I am using Joomla for this particular project. To achieve certain functionality, I am using Mighty Extensions components.

Their components give me the following URL:

[URL unfurl="true"]http://www.example.com/en/username[/URL]

In other words: domain/language/registered user.

I have been told that their components already use mod_rewrite to achieve that URL.

What we want is the URL to look like this:

[URL unfurl="true"]http://username.en.example.com[/URL]

In other words: username.language.domain

So, my question is: Is it possible for mod_rewrite to rewrite a URL that it has already rewritten?

If so, please let me know how it is possible.

Thank you.

Kind regards
wickyd