var_dump($parsedData->children()->children()->body->children());

object(SimpleXMLElement)[1070]
  public 'trans-unit' =>
    array (size=23)
      0 =>
        object(SimpleXMLElement)[1071]
          public '@attributes' =>
            array (size=2)
              ...
          public 'source' => string 'change_password.submit' (length=22)
          public 'target' => string 'Kennwort ändern' (length=16)
      1 =>
        object(SimpleXMLElement)[1072]
          public '@attributes' =>
            array (size=2)
              ...
          public 'source' => string 'fos_user_registration_form_email' (length=32)
          public 'target' => string 'Email' (length=5)