E_NOTICE because of expected language definition

It specifically happens when I use drupal_execute(). I'm not too sure why drupal_execute() would not work the same way as the other calls. The same code should be hit...

node_form() executes this loop that adds language every time and with a #value (no default...)

  foreach (array('nid', 'vid', 'uid', 'created', 'type', 'language') as $key) {
    $form[$key] = array(
      '#type' => 'value',
      '#value' => isset($node->$key) ? $node->$key : NULL,
    );
  }

Thus I do not have any good explanation why that would be happening! (other than, it must not be going through that function at all when just calling drupal_execute().)

Thank you.
Alexis Wilke

No problem, I think that's my specialized use of the module that generates the problem. Thank you. Alexis