Sonja Elen Kisa (born 1 November 1978) is a linguist and professional translator (English, French and Esperanto).

She became known through her creation of Toki Pona, an experimental language, designed for the purpose of testing the Sapir–Whorf hypothesis. Toki Pona is inspired by taoism and intended to shape the thought processes of its users in Zen-like fashion.