I've been looking for some time for a solution to make a multilingual blog.
My idea is to write the same post in the different languages, and then, once posted, WP links them togheter as translation of each other.
Having multiple languages on a blog is a need for a lot of bloggers (especially in those countries where there are more official languages), I know that there are several plugins around, but...
What if the plugin developer decides to quit, and the plugin becomes incompatible with the newer versions of WP?
The fear shared among many multilingual bloggers is that the they can risk losing the content every time a new version of WP is released.
Every solution has some kind of flaw into it, that makes upgrading WP more complicated than it is.
They either manipulate the DB, or use templates.
The solution in the Codex, http://codex.wordpress.org/Multilingual_WordPress , hinting at the use of multiple blogs could be the best one, however there is no known plugin that actually ties two posts from two different blogs as translation of each other.
I did my research, and found the following threads, however they are currently closed, (otherwise I would have posted in them):
Many of those suggestions have been deemed has "plugin territory", but for the reasons stated before, a plugin not mantained by the core team can bring several problems with it, and scare bloggers away.
Should a multilingual support see the light as a core enhancement?