In mcsw.php, before this code
if (!empty($_POST['wpmm']))
put this code :
$languages = icl_get_languages('skip_missing=0&orderby=code');
if(!empty($languages)){
foreach($languages as $l){
if ($l['active'] == 1 && $l['language_code'] != 'fr') { // fr is default langage, remplace by YOUR default langage
$la_langue = '?lang='.$l['language_code'] ;
}
}
}
then, replace this code :
if (get_option('permalink_structure')!= '')
{
wp_redirect(get_bloginfo('url').'/categories/'.$sql.'/search_type/'.$_POST['mmctype'].'/order/'.$_POST['order'].'/');
exit();
}
else
{
wp_redirect(get_bloginfo('url').'/?cat='.$sql.'&search_type='.$_POST['mmctype'].'&order='.$_POST['order']);
exit();
}
by this one :
if (get_option('permalink_structure')!= '')
{
wp_redirect(get_bloginfo('url').'/categories/'.$sql.'/search_type/'.$_POST['mmctype'].'/order/'.$_POST['order'].'/'.$la_langue.'/');
exit();
}
else
{
wp_redirect(get_bloginfo('url').'/?cat='.$sql.'&search_type='.$_POST['mmctype'].'&order='.$_POST['order'].'&'.$la_langue);
exit();
}