This chapter analyses whether states in Southeast Asia – focusing particularly on Cambodia, the Philippines, Indonesia, and Myanmar – have accepted, rejected, or adapted ideas about international criminal justice. It confirms that there has been significant engagement with international criminal law in Southeast Asia. The chapter then assesses the benefits and limitations of a localisation framework for exploring this process. Using examples from the previous chapters, it explains how approaches to international criminal justice are adapted dynamically over time, across different spaces (not clearly delineated as local/international), and in varying directions (outside-in/inside-out). These findings present constructive ways to complement the ‘localisation’ approach. The chapter ends by identifying several practical implications of this analysis for those advocating for international criminal justice in Southeast Asia, including for the development and implementation of relevant legal frameworks. It argues for a nuanced approach to examining actors' engagement with international criminal justice that is transparent about its normative aims and learns from how diverse actors already draw on adapted arguments to influence legal responses to violence within and across different times and spaces.