It has been widely recognized that how languages behave, particularly under conditions of contact with other languages, depends on their context. Using the Ethnolinguistic Vitality framework, this chapter describes the demographics, linguistic attitudes and institutional supports for heritage languages, defining the concepts and illustrating them with examples from Toronto, the context in which the HLVC project is conducted. Demographic information includes population sizes, language shift rates, and history of settlement in Toronto. Status information includes both reflections on the status of heritage languages, as a whole, in Canada and labels attributed to the specific varieties. The institutional support section reports on the number of language classes available for each language. The chapter also includes discussion of language policy, particularly for education, and the demographics of the university where the research is centered, enabling other researchers to best consider what aspects of the project might need adjusting for adaptation in other contexts.