The academic programme of the Ecumenical Institute is carried out through plenary lectures, seminar work, individual study and research, supervised reading, Bible studies, study visits and group and individual assessment.

Bossey is a multicultural and multilingual place for ecumenical formation. Students are expected to contribute to this by their willingness to speak a language other than their mother tongue. The main working language of the students and faculty, however, is English. The required final research papers can be written in English, French or German.

Due to its location in French speaking Switzerland, and its affiliation to the University of Geneva, French continues to be the second most important language spoken at Bossey.