This document discusses language maintenance and shift. It defines language maintenance as the continuing use of a minority language in the face of a dominant language, while language shift refers to one language displacing another in a community's linguistic repertoire. The document then examines factors that can contribute to language shift, including the prestige of the dominant language, economic pressures, and institutional domains like schools. It analyzes language shift patterns among migrant minorities, non-migrant minorities, and migrant majorities. Finally, it discusses factors that accelerate language shift and ways that minority languages can be maintained, such as through community ties, contact with homelands, institutional support, and positive language attitudes.