Here is every conlang summarized by someone who is not that into conlangs
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"
