Traditional sending countries of international students in East Asia have emerged as increasingly desirable higher education destinations. Yet little is known about the experiences of international students in East Asia as most research focuses on those in the Anglophone West. In this study, we explored the trajectory and interactions between intercultural communication, acculturation strategies, and adaptation outcomes of international students in Hong Kong. We conducted in-depth interviews with international students from other Asian countries (n = 14) and Western countries (n = 10). Our research reveals a paradox where international students’ eagerness to engage with diverse peers is overshadowed by limited interaction with local students. Cultural and language differences were perceived to create a wall separating them from the local students, inhibiting a cosmopolitan learning environment. Additionally, international students often gravitate towards familiar national or cultural groups, which can hinder broader integration. Sociocultural challenges and outsider feelings were also reported, potentially leading to psychological issues. We propose an interactive framework that connects intercultural communication, acculturation strategies, and adaptation outcomes. The paper offers theoretical and practical insights for policymakers, administrators, educators, and students, aiming to foster effective communication and successful acculturation in a multilingual and multicultural educational setting. Copyright © 2024 The Author(s).