Introduction: Languages and plants together promote planetary health.

We are pleased to present this special edition of Sociolinguistic Studies devoted to the triadic relation among people, the plants they rely upon and nurture, and the languages they speak. Given the current global recognition of threats to biodiversity, and of the language extinction crisis, it is fitting that a leading sociolinguistics journal should explore how languages reflect human adaptation and coexistence with plants. Renewed attention to the nexus of these two diversities, and a way of working that includes and centers Indigenous and local authors and perspectives will be key tools in addressing the intertwined threats to the diversity of both plants and languages. The articles in this issue invite us to visit locations as diverse as Mexico, Mongolia, Siberia, Vietnam, and Vanuatu. In all these places, and many more, we can witness the ways in which people talk about, perceive, use, and foster plant biodiversity to the benefit of the entire planet. [ABSTRACT FROM AUTHOR]