Wilcox created a 6,000-word Wukchumni dictionary, the first written record of the language.
In September 2014, Marie Wilcox achieved a historical milestone by completing the first written dictionary of the Wukchumni language. This 6,000-word compendium represented the culmination of over a decade of dedicated work to document and preserve her native dialect. Her contribution was nothing short of monumental, considering that Wilcox had to overcome the challenges of being the last fluent speaker and the technological barriers of creating a digital dictionary in her 70s.
This dictionary not only serves as a resource for her descendants but has also paved the way for the revitalization of the Wukchumni language, inspiring other indigenous communities to engage in similar preservation efforts. Acknowledged as a pioneering endeavor, this work stands as a testament to Wilcox's profound commitment to language and cultural preservation.