I went with my 12-year-old daughter (who can speak Japanese, a little Korean, and a little English) and my 8-year-old son (who can speak Japanese and English, but no Korean). We've been to KidZania many times in Japan, so we thought Seoul would be no problem, but we didn't understand Korean and got lost at the entrance procedures (lol). The staff kindly explained everything to us. The experiences were also in Korean, so it seemed difficult for my son, who doesn't speak Korean. However, all the staff were kind, and there was staff at the driving school who could speak Japanese, which was helpful. It was great that we were able to experience jobs that are only available in Korea. Unlike in Japan, you can't reserve another job experience until you've finished one (although you might be able to if you pay), so it feels more laid-back except right after you enter. On the flip side, there was a great food court and self-service job experience booths, so the wait times were long. We were even able to use Japanese KidZos!