Wow, that's great. The team ORDASOFT has helped me.
This is an exceptionally good support. I have not believed that it works because I have a very complex Joomla installation.
This extension, SEF-Translate, has dropped me from the beginning, I was just disturbed that this extension, the flag is not valid XHTML. I'll try to correct it. Then there is the best system for Joomla Translate associated with SEO.
A perfect XML sitemap for Google.. A perfect site map and structure of an HTML site for the user.
Many, many thanks.