Io (pronounced /ˈiːdoʊ/) is a constructed language created with the goal of becoming a universal second language for speakers of different linguistic backgrounds as a language easier to learn than ethnic languages. This intended usage parallels the current use of English as a lingua franca, and of French, Latin, and Greek in earlier eras. Unlike English, which is a natural and frequently irregular language, Ido was specifically designed for grammatical, orthographic, and lexicographical regularity, and to favor no one who might otherwise be advantaged in a situation due to native fluency in a widespread language. In this sense, Ido is classified as a consciously created International Auxiliary Language (conIAL). Of the most widely used conIALs, the first one is Esperanto, Ido's predecessor; it is disputable whether the second place in usage goes to Ido or Interlingua.