dont’t know if It could be useful. I use wordpress 2.7.1 and use wp-multilingual plugin. I also got troubles with multilingual and search plugin (clicking on search button, language resetted to default).
I solved in this way:
first I wrote a function in the header.php file of my theme to recognize the actual language used by visitor. This is the code:
function language (){
global $actual_language;
$my_url = "https://".$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'];
$actual_language = substr($my_url , -2, 2);
return $actual_language;
}
then, I add an hidden field to the form in the searchform.php file of my theme:
<input name="language" type="hidden" id="language" value="<?php echo language() ?>"/>
that’s all.
this hidden field append “&language=actual_language” to your search query so the action of your submit button becomes:action=”your_blog_url/?s=word_you_are searching_for&language=actual_language”
this prevent to change to default language when you use the search module of your blog
