From sona pona, the Toki Pona wiki

The speaking community widely considers tonsi to be a crucial addition to Toki Pona, referring to it as an honorary nimi pu to give it equal consideration to meli and mije in spite of pu-rism. In the "Notes on lipu pu" section of the Toki Pona Dictionary, jan Sonja endorses the effort:[1]

  1. Lang, Sonja. (18 July 2021). Toki Pona Dictionary. Illustrated by Vacon Sartirani. Tawhid. ISBN 978-0978292362. p. 6.