Big update ! A few bug corrections and now widget compatible !
Download : Plugin YammYamm 0.6 for Wordpress
YammYamm (yet another multilingual manager x2). You create a top category and a top level page for each language. In the options panel, you set the languages. When you create an article, make it under the language top category. When you create a page, make it under the language top page. Then you call the appropriate functions in your template for language selection and navigation display. That's it.
Usage :

There are 2 files to edit:
Edit your sidebar.php then call the function "yy_menu($args_page,$args_blog);" instead of "wp_list_cats" and/or "wp_list_pages" like this :
<ul>
<?php if(function_exists('yy_menu')) yy_menu('sort_column=menu_order&title_li=','title_li=&hierarchical=1'); ?>
</ul>
Explanation :
The function will display the menu (with "ul/li" tags) automagically depending on whether the visitor is on a page or a post, and will guess the language too.
Update : To show always and only the blog categories, dont fill the "$args_page" argument, and do the contrary to show only the pages :
<ul>
<?php if(function_exists('yy_menu')) yy_menu('','title_li=&hierarchical=1'); ?>
</ul>
<?php if(function_exists('yy_redirect')) yy_redirect(); ?>
It will detect the language from the browser and redirect to the home page og this language.
Update : In the options panel, you can choose whether to set the top page or the top category as the home of your website.
<?php if(function_exists('yy_lang_menu')) yy_lang_menu("lang_menu"); ?>
This will output :
<li id="fr_FR" class="lang_menu current_page_item">
<a href="http://www.jide.fr/francais/">
<span>francais</span>
</a>
</li>
(etc...)
One of the biggest part of this update is that there is now a sidepanel in the admin page :
When you write a blog post, if no langu_age is set for that post, all the categories will be shown. If you set a language, only the sub-categories will display :


That is the same for the pages. If no language is set, all the pages will be shown. If you choose a language, only the children pages will display :


Roadmap :
Download : Plugin YammYamm 0.6 for Wordpress