[Plugin Zd Multilang] WordPress Search won´t work

Hello,

I´m developing a theme with search and I can´t make the wordpress search work with the ZdMultilang translated fields, it only searchs the original post.

I switch languages in the backend of ZdMultilang and I was able to search in the translated language, (it became the main language), but the now translated language returned no results.

I research a lot in the web and found a function in wordpress codex to append a plugin table to the wpdb post search. It´s down bellow here:

add_filter('posts_join', 'mlang_search_join' );
add_filter('posts_where', 'mlang_search_where' );
add_filter('posts_groupby', 'mlang_search_groupby' );

function mlang_search_join($join)
{
  global $zd_ml_trans, $wpdb;
  if(is_search()) {
      $join .= " LEFT JOIN $zd_ml_trans ON " .
       $wpdb->posts . ".ID = " . $zd_ml_trans .
       ".post_content ";
  }
  return $join;
}

function multilang_search_where($where)
{
  if( is_search() ) {
    $where = preg_replace(
       "/\(\s*post_title\s+LIKE\s*(\'[^\']+\')\s*\)/",
       "(post_title LIKE \\1) OR (post_content LIKE \\1) OR (post_excerpt LIKE \\1) OR (post_status LIKE \\1)", $where );

   }
  return $where;
}

function multilang_search_groupby( $groupby )
{
  global $wpdb;

  if( !is_search() ) {
    return $groupby;
  }
  // we need to group on post ID
  $mygroupby = "{$wpdb->posts}.ID";
  if( preg_match( "/$mygroupby/", $groupby )) {
    // grouping we need is already there
    return $groupby;
  }
  if( !strlen(trim($groupby))) {
    // groupby was empty, use ours
    return $mygroupby;
  }
  // wasn't empty, append ours
  return $groupby . ", " . $mygroupby;
}

I don´t know why this is not working, but I would really appreciate any help on this matter. With the Search Everything sometimes it returns a result sometimes don´t.

Also, I noticed when you perform a search, you can´t switch languages. It would be nice to have a function to add that change to the plugin.

Tiago Morena