Multilingual site - advice needed
Hello!
I have launched a site that is in one language (drupal), and am planning to develop it some kind of multilanguage-way. I have looked at multilanguage-modules (eg translating nodes into multilanguages, but that is not entirely what i want.
What would have been best was a subsystem-site looking like this:
en.sitename.org
fr.sitename.org
sv.sitename.org
There are no reason for translating nodes into more languages than one, but the whole supportsystem when adding divesites must be in the language that the interface is in.
I then want sitename.org without prefix to be able to address all nodes in the whole system, then preferably with english interface.
My problem is, I do not want multilanguage nodes, only the system and categories. And I don't want users from one side to be able to switch. Basically I want to keep it simple for the users. I don't want frenchmen to know this is a multilanguage site when using fr.sitename.org
Is there a possible way to do this? If y'all need more information, or don't really get what I mean, please let me know, and Ill explain further.

Did you try multisite
Did you try multisite feature?
isn't multisite framework
isn't multisite framework just a framework for managing different installations from one codebase?
In addition to that, I need something to manage nodes across several installations, any suggestions?
Another completely different way to solve it is if there are a module like referer_language (ex like referer_theme) which switches languages after where you are visiting from..