translation_node_get_translations() bug?
I found the solution: Calling translation_node_get_translations(), I have to provide the tnid (the node ID of the original node) as parameter, not nid, as nodes are translated by the node ID of the original node.

function _azzurra_get_translations_nids($node){
  $nodes = translation_node_get_translations($node-&gt;tnid);  

  $nids = array();
  foreach($nodes as $value){
    $nids[] = $value-&gt;nid;
  }

  return $nids;
}


I wrote this function who return a list of all nids related to the argument node [included the nid of the argument node.. ]