Dzardzongke or South Mustang Tibetan (SMT) (ca. 1800 speakers) is a severely endangered language spoken in a number of villages in South Mustang, Nepal. It is related to Loke/Lowa, another language of the Bodish branch of the Sino-Tibetan language, which is also an endangered language spoken in Upper Mustang. Most speakers of SMT are fluent in Nepali and Seke as well and SMT is not used in writing or education, putting it in a very precarious situation. Due to economic difficulties in the aftermath of the 2015 earthquake and the current pandemic, speakers are rapidly leaving the villages to find employment in Kathmandu and abroad. This is having a disastrous effect on the local language and cultural traditions, which is why this project aims to acquire audio-visual materials that will help preserve the local language and unique pre-Buddhist Bon cultural tradition. This project has three main outcomes: high-quality audio-visual materials with transcription, translation and linguistic annotation, the first-ever book written in Dzardzongke with linguistic and anthropological introductions and a school textbook and story books to faciliate teaching SMT-speaking children in their own language. The outputs will benefit both the SMT language community and researchers in the field of (Tibeto-Burman) linguistics.