What's the language like when getting advice in Seoul?

Hello! My name is Tuya, and I'm planning to come from Ulaanbaatar to Seoul for cosmetic treatments. My question is about language barriers — is speaking English sufficient? Or do I need to bring a Mongolian interpreter?

My English is quite good, but during consultations, I prefer to speak in my native language to fully understand everything. Do Seoul clinics have staff who speak Mongolian? Are there Mongolian speakers available for services? I'm curious if anyone has experience with this!

If you have any experiences or insights on which language was more practical for this type of situation, or any difficulties you encountered, please share them here. Thank you!