Immigration waves in many parts of the world including in Europe, Asia and the Americas have contributed to their pre-existing linguistic and cultural diversity through the spread of various heritage languages (hence, HL) and cultures. In the context of migration, HL refers to the language(s) practised in the home and familial contexts. For immigrant communities, HLs represent a fundamental means of shared expression and construction of ethnic identity. However, in the host society, the pressure of dominant language(s) on these minoritized languages is relentless, partly because many users of these languages can see more opportunities if they shift to the majority or dominant one. Despite these pressures, HL speakers to varying degrees maintain or reclaim their languages as active agents through intergenerational transmission and everyday interactions. Therefore, researching the family's language decisions regarding HLs and cultures is vital as they offer important insights into the dynamics of identity formation and home language development as well as maintenance in transnational communities.