What was your exact problem with Wordpress? We seem to share the same architectural needs (although we only work in 2 lanuguages, but one of them is LTR and the other is RTL) and we have Wordpress working perfectly for us. We had to tweak it a little bit, using plugins and some extra dev adaptation (mostly for performance, not language related), but it does the work.

We've tried a few other like silverstripe and Ionize, but both were way to complicated and required a cumbersome process much like the one you mentioned in your post.