This volume brings together a set of fundamental contributions, many translated into English for this publication, along with an important introduction. Together these explore the role of Greek among Christian communities in the late antique and Byzantine East (late Roman Oriens), specifically in the areas outside of the immediate sway of Constantinople and imperial Asia Minor. The local identities based around indigenous eastern Christian languages (Syriac, Coptic, Armenian, Georgian, etc.) and post-Chalcedonian doctrinal confessions (Miaphysite, Church of the East, Melkite, Maronite) were...