I've spent hours reading about multiple installs, database prefixes, networks, virtual multiblogs, etc, but I still haven't figured out how to do what I want to do.
I've got one blog already (with posts and comments) at "mydomain.com/". I would like to have exactly the same blog show up at "mydomain.com/fr/". (This is the "French" version, although none of the actual posts or comments will be translated - I just need to show some menus in French instead of English.)
The kicker is that I don't want to just do an occasional mirror of the original blog posts. I'd like it to display exactly the same content, as if it were retrieving content from the same database (i.e. all posts and comments show up immediately in both places). I don't mind if it's a separate WP install.
I tried just doing a second install and using the same database and prefix as the first, but of course I got an error. I've also tried looking for some kind of database syncing system, but I couldn't find anything that would seem to do what I want it to. I also looked into an automatic RSS import, but that would seem to only get the posts and not the content. I got partway there using categories and tags, but each post still only showed up in one spot.
I also understand that there is probably a more reasonable way to go about this... I've seen a lot of options, but if you think there's a good one please don't hesitate to mention it.
Thank you very much for any help you can offer!