 Languages in the above table written in "italics" are constructed languages and are not natural, that is to say that they have been purposefully invented by an individual (or group of individuals) with some purpose in mind.They do, however, all belong to language families themselves.Esperanto is derived from European languages and therefore all of its roots are found in Proto-Indo-European and cognates can be found in real-world languages like French, German, Italian and English.