The study focuses on Polish-speaking families residing in Australia and their digitally mediated communication practices. Against the backdrop of social changes influencing family roles, a new father-child relationship characterised by presence and active involvement in a child’s life, has recently transpired. As the fathers’ role in minority language transmission has not been given much prominence in research, this presentation offers novel insights into how Polish fathers endeavour to maintain Polish through digitally mediated communication. Research on digital practices in the context of CS has been scant, despite the fact that everyday reality of transnational multilingual families has been permeated by technology. Thus, this research demonstrates how family members function in online habitats where portable electronic devices, as well as broadband internet connection, hotspots and various communication apps and social media have become prevalent. There have been two overarching research question for the present study: (1) Is CS a prevalent phenomenon in digitally mediated communication among members of transnational families?; and (2) What are the functions of CS in digitally mediated communication between Polish fathers and their children? Six excerpts containing examples of CS practices among three different families, where instant messaging via Messenger has been adopted to maintain Polish will be scrutinised.