Jieun Kiaer is a linguist and academic known for her research on language, communication, and digital discourse. She is a professor of Korean language and linguistics at the University of Oxford, where her work examines how language evolves across cultures and technological platforms. Kiaer has published widely on Korean linguistics, translation, and cross cultural communication. She is the author of Emoji Speak: Communication and Behaviours on Social Media, published by Bloomsbury in 2023, which analyzes how emojis function as part of digital language and how they shape meaning, tone, and interaction in online communication.