This website was created by the Jejueo Support Team (제주어 지원 팀) to disseminate information on Jejueo, the language of Korea's Jeju Island. 

The team was formed in 2013 by William O'Grady, Changyong Yang, and Sejung Yang, to contribute both to the description of Jejueo and to its preservation and revitalization. 

Our initial project was creating an intelligibility test that allows speakers of Korean to see that they are unable to understand Jejueo--a key piece of evidence that it is a separate language. The completed intelligibility test was used in 2014 in an experiment involving monolingual speakers of Korean in three cities in mainland Korea, as well as speakers of Jejueo on Jeju Island. The results were first presented later that year at the Seventh World Congress of Korean Studies; they have since been published in a paper entitled "Revising the Language Map of Korea," which can be found at this website.

We express our deep gratitude to the Academy of Korean Studies, the Center for Korean Studies at the University of Hawai'i, the Jejueo Preservation Society (제주어보전회) and, most importantly, individual members of the Jejueo community for their assistance and support. 

*This work was supported by the Core University Program for Korean Studies through the Ministry of Education of the Republic of Korea and the Korean Studies Promotion Service of the Academy of Korean Studies (AKS-2015-OLU-2250005).