Most migrant families living anywhere in the world,are concerned with maintaining their ethnic language,in order to sustain a sense of belonging to the country of their origin and enable extended family harmony.This study explores the survival of Sundanase language among eight indonesian families of WEST JAVA origin (sundanese speakers)living permanently in Melbourne,Australia.Most of these families migrated to Australia in the 1950s as Colombo plan scholars and unskilled labourers.Semi-structured interviews and home observations showed that,despite believingin the importance of sundanese languange in their diasporic life,speaking sundanese is the only practice that most of the participating parents,can do to maintain their languange ,alongside Bahasa Indonesia and English ,to show they belong to the sundanese culture.However ,sundanese languange levels of politeness limit its use among their Australia-born second generation,making this ethnic languange unlikely to survive.The young people only understand and copy a few routine words of greetings and short instructions.The study also suggest that the parents needed to be accommodative in order to maintain the sundanese languange by combining it with English and Bahasa Indonesia.