Horde_Mime_Part::setLanguage PHP Method

    public function setLanguage($lang)
    {
        $this->_headers->addHeaderOb(new Horde_Mime_Headers_ContentLanguage('', $lang));
    }

 /**
  * Recursively parse BODYSTRUCTURE data from a FETCH return (see
  * RFC 3501 [7.4.2]).
  *
  * @param Horde_Imap_Client_Tokenize $data  Data returned from the server.
  *
  * @return Horde_Mime_Part  Mime part object.
  */
 protected function _parseBodystructure(Horde_Imap_Client_Tokenize $data)
 {
     $ob = new Horde_Mime_Part();
     // If index 0 is an array, this is a multipart part.
     if (($entry = $data->next()) === true) {
         do {
             $ob->addPart($this->_parseBodystructure($data));
         } while (($entry = $data->next()) === true);
         // The subpart type.
         $ob->setType('multipart/' . $entry);
         // After the subtype is further extension information. This
         // information MAY appear for BODYSTRUCTURE requests.
         // This is parameter information.
         if (($tmp = $data->next()) === false) {
             return $ob;
         } elseif ($tmp === true) {
             foreach ($this->_parseStructureParams($data, 'content-type') as $key => $val) {
                 $ob->setContentTypeParameter($key, $val);
             }
         }
     } else {
         $ob->setType($entry . '/' . $data->next());
         if ($data->next() === true) {
             foreach ($this->_parseStructureParams($data, 'content-type') as $key => $val) {
                 $ob->setContentTypeParameter($key, $val);
             }
         }
         if (!is_null($tmp = $data->next())) {
             $ob->setContentId($tmp);
         }
         if (!is_null($tmp = $data->next())) {
             $ob->setDescription(Horde_Mime::decode($tmp));
         }
         if (!is_null($tmp = $data->next())) {
             $ob->setTransferEncoding($tmp);
         }
         $ob->setBytes($data->next());
         // If the type is 'message/rfc822' or 'text/*', several extra
         // fields are included
         switch ($ob->getPrimaryType()) {
             case 'message':
                 if ($ob->getSubType() == 'rfc822') {
                     if ($data->next() === true) {
                         // Ignore: envelope
                         $data->flushIterator(false);
                     }
                     if ($data->next() === true) {
                         $ob->addPart($this->_parseBodystructure($data));
                     }
                     $data->next();
                     // Ignore: lines
                 }
                 break;
             case 'text':
                 $data->next();
                 // Ignore: lines
                 break;
         }
         // After the subtype is further extension information. This
         // information MAY appear for BODYSTRUCTURE requests.
         // Ignore: MD5
         if ($data->next() === false) {
             return $ob;
         }
     }
     // This is disposition information
     if (($tmp = $data->next()) === false) {
         return $ob;
     } elseif ($tmp === true) {
         $ob->setDisposition($data->next());
         if ($data->next() === true) {
             foreach ($this->_parseStructureParams($data, 'content-disposition') as $key => $val) {
                 $ob->setDispositionParameter($key, $val);
             }
         }
         $data->next();
     }
     // This is language information. It is either a single value or a list
     // of values.
     if (($tmp = $data->next()) === false) {
         return $ob;
     } elseif (!is_null($tmp)) {
         $ob->setLanguage($tmp === true ? $data->flushIterator() : $tmp);
     }
     // Ignore location (RFC 2557) and consume closing paren.
     $data->flushIterator(false);
     return $ob;
 }