The Esperantic Studies Foundation, abbreviated ESF, is a non-profit organisation initiated in 1968 by Jonathan Pool, E. James Lieberman and Humphrey Tonkin, with the aim to further the understanding and practice of linguistic justice in a multicultural world, with a special focus on the study of interlinguistics and the role of Esperanto.
[1] Its priorities and values are shaped through engagement with the worldwide community of Esperanto speakers, as well as with researchers, educators and activists in many language-related fields.
[5] ESF sponsors also a number of other events, including the Nitobe Symposia, a conference series on world language problems that bring together activists, academics and politicians.
as well as a series of symposia on language and development in New York aimed at raising the awareness of the United Nations about the importance of language equality for human development and human rights.
ESF also sponsored the creation of the documentary film The Universal Language, and produced the video course Esperanto—Pasporto al la Tuta Mondo (available on YouTube), ESF also helped to establish official Esperanto examinations in accordance with the Common European Framework of Reference for Languages.