Someone

$db = new owdb;
$db->connect(DBURL);
$db->query("select lg from lingue_scelte");
while($row = $db->fetch_object())
  $arr[] = $row->lg;
$db->close();

foreach($lang['language'] as $key=>$val)
{
  $found=false;
  for($i=0;$i<count($arr);$i++)
    if($key == $arr[$i]) $found=true;
  if(!$found)
    echo "<option value=\"".$key."\">".val."</option>\n";
}