Thanks for your reply, but the problem regards the translation of database objects and not translation of the client.
The language modules are used for the client, but at the end you need also the translation of the objects ( for example, "Customer" in english, "Kunde" in german, "Client" in french).
For the translation of table fields, form, report and so on, there are specific translation files that you can import into the database, and the problem is where we can find these file, because I could not find them on the microsoft partnersource site.