This presentation will examine the extent of English use in KAIST, a well-reputed science and engineering university in Korea. KAIST introduced an all-out EMI policy that required almost all undergraduate classes to be taught in English for the first time among Korean universities and has maintained a high percentage of EMI classes (over 70%). However, English is far from achieving the status of a lingua franca; the use of English is limited in the classroom. Also, the degree of linguistic and cultural sensitivity to the international population is fairly low. The presentation will attempt to explain these Englishzation-related phenomena.