Book excerpt: The volume explores linguistic practices and choices in the late antique Eastern Mediterranean. It investigates how linguistic diversity and change influenced the social dimension of human interaction, affected group dynamics, the expression and negotiation of various communal identities, such as professional groups of mosaic-makers, stonecutters, or their supervisors in North Syria, bilingual monastic communities in Palestine, elusive producers of Coptic ritual texts in Egypt, or Jewish communities in Dura Europos and Palmyra. The key question is: what do we learn about social groups and human individuals by studying their multilingualism and language practices reflected in epigraphic and other written sources?