Esperanto: Designed by a Polish speaker who wants to speak Italian
Toki Pona: Designed by an English speaker who wants to speak Japanese
Loglan/Lobjan: Designed by (a science fiction author/a committee of USENET users) who want to speak the logical notation from Russell and Whitehead's "Principia Mathematica"
Ido/Novial: Designed by (French/Danish) speakers who want to speak Esperanto but can't pronounce it
Lingwa de Planeta: Designed by Russian speakers who want to speak Novial but with more non-European cognates
Ithkuil: Designed by World Wide Web users who want to communicate by telepathy
Solresol: Designed by a French speaker who wants to be a bird
