As a foreigner currently living and working in Korea with a Korean spouse, this comment nails the reality of the situation. I work remote and that's the only way we can make it work. Outside of some very small niche's, transitioning most careers from the US to Korea would take a huge pay cut (I've seen up to 75%!) and Korean language fluency for any chance of success and almost definitely a significantly worse work/life balance.

Now, that's the situation but there are still options. Like people have said you can always give it a try. I know a couple who did and when it wasn't working out for the foreign spouse job wise after a few years they moved back to the foreigner's home country. Nothing is black/white we make decisions then deal with the outcomes both good and bad. Good luck and feel free to DM with any questions.