How can foreigners and the media be trusted?

Hello, everyone! My name is Misheel, and I'm from Mongolia. I'm currently considering visiting cosmetic clinics in Korea and have been reading user reviews. The thing is, I don't understand Korean well and mostly rely on Google Translate. What kind of country-specific websites do people usually use? Which parts of the reviews do you feel are fake or just marketing language?

Before visiting any clinic, what red flags should I look out for? For example, I've heard that people should avoid clinics that guarantee good results, but how common is this? Also, for foreigners, is a weak language or English service actually important?

What insights do you have about specific reputable clinic websites that I should pay attention to? It feels like a very overwhelming process, and I just want to find trustworthy reviews. I need help!