Ok.... now I understand why "it didn't work...".
I thought that sh404SEF was doing at least "something" automatic or for all pages, and that the Url manager was a tool to improve or personalize it, but not to do everything
Finally, I will modify the realestatemanager.php, to make titles and tags adaptable to a multilanguaje site, because now the titles are always in english and with "realestate manager" text.
If this is possible to change for all the website, not just page per page, please tell me. A site with 5 languajes is so hard to prepare if is page per page