South Korea, Seoul
Let the school know you're thinking of applying — they can share their prerequisites and help you through the process.
It's best to ask — circumstances can change at any time.
The site notes a multilingual approach to language learning at Dwight Seoul, indicating an international language focus. It does not specify which languages are taught, whether language instruction is bilingual, or the levels offered. There is no information about language support for non-native speakers beyond general multilingualism.
Dwight School Seoul is an International Baccalaureate school serving students from Preschool through Grade 12, offering the PYP, MYP and DP. The campus is located in Seoul’s Digital Media City area and includes facilities such as a 455-seat performing arts center, a library, technology labs and dedicated spaces like a Makerspace and “Bakerspace.” Students can join activities ranging from Model United Nations to Robotics. The school lists participation in multiple varsity teams. Dwight Seoul is also an independent award center for the Duke of Edinburgh International Award. The language of instruction is English and the school discloses language learning options that include Korean, German and Spanish.