Indigenous communities in Mexico have developed sophisticated systems for naming and classifying wild mushrooms based on where they grow, what they look like, and cultural beliefs. This study documents how the Chatino, Chontal, and Chinantec peoples of Oaxaca name 32 different mushroom species using their own languages. Older community members know more indigenous mushroom names than younger people, showing that this traditional knowledge is gradually being replaced by Spanish terms. Understanding these traditional naming systems helps preserve cultural heritage and ensures communities can safely identify which mushrooms are safe to eat.