At the 91° World Conference of Esperanto in Florence, and at the 50° International Congress of Esperanto Children in Prato (involving children from 6 to 13 years) the delegated are commonly using the international language. During this days in Florence the other tourists often have stop them to make questions about the different language they felt spoken. The esperanto, born in the 1887 by the brilliant will of a Polish student, now is diffused all over the world and several nations and institutions have recognized ufficially.