How can foreigners find a trustworthy clinic? Does anyone have experience?

Hello, my name is Pat, and I'm from Thailand. I'm planning a trip to Korea for a check-up and possibly some aesthetic enhancements. However, I'm really unsure about which clinic to trust. I'd like to ask how fellow foreigners choose a safe and good clinic.

My main concern is the language barrier, as I don't speak Korean very well. Is it possible to have an interpreter or communicate in English? Are there ways to verify if a clinic is legitimate, or are there common practices for choosing one? For example, checking websites or asking other foreigners who have been there.

To those who have been to Korea, thank you in advance for sharing your experiences on how you verified clinics or what you prepared before your first consultation. I'd love to get your advice.