High-quality doctor-patient communication in end-of-life care results in better quality of life for patients. In linguistically and culturally diverse societies, language discordant consultations become daily practice, leading to difficulties in eliciting patient preferences toward end-of-life care. Although family members invariably act as informal interpreters, this may cause some ethical dilemmas. We present a case of a palliative patient whose son acted as an interpreter. This case generated a triple- layered ethical dilemma: how to safeguard patient autonomy against paternalistic interventions by (...) family members, how to respect the relational context in which patient autonomy can be realized, and how to respect the ethno-cultural values of the patient and his family. These issues are being discussed and reflected upon within the framework shared decision making involving informal- and professional interpreters. The complementary use of professional interpreters next to family members acting as informal interpreters is recommended. (shrink)