On the morning of Friday, August 22, 2025, the College of Social Sciences and Languages (CSSL) of the National Defence University of Cambodia, in collaboration with the Royal Australian Defence Force, held the official closing ceremony of the 2025 Regional English Language School Seminar under the co-chairmanship of His Excellency Lieutenant General DOK Sopha, Rector of the National Defence University, and Group Captain Tony Peck, Chief of the Australian Defence Attaché Office in the Kingdom of Cambodia, at the CSSL auditorium. It is worth noting that the week-long seminar was jointly organized by the CSSL and the Royal Australian Defence Force to share and exchange best practices in English language teaching, with participants from ten countries: Australia, Cambodia, Indonesia, Laos, Malaysia, Mongolia, New Zealand, Timor-Leste, Tonga, and Vietnam. Finally, the National Defence University expresses its deep appreciation to all delegates, especially the Royal Australian Defence Force through the Defence Attaché Office of the Australian Embassy in Cambodia, for their cooperation and hard work in ensuring the smooth and successful organization of the seminar. The National Defense University wishes all delegates of the 2025 Regional English Language School Seminar a safe journey home.