Originally Posted by alvin_
Regarding the necessity of using Korean in Korea, let me say this: I have been trying very hard to learn Korean for several years living here, and the number one problem I have is that *everybody* wants to speak English with me, and, even if I try to use Korean, they almost always (outside of basic greetings) reply in some kind of English....so, no, you sure the hell don't need it. Don't even waste your time for a 4 week stay. I wouldn't recommend even for a one-year stay, to be frank.
you may want to learn about the food options, though. So you can understand what is on menus, since that stuff isn't easily translated...Even people who know English well cannot easily explain Korean cuisine to you, and the least educated class of people you will likely run into are the ones working in restaurants, that is for sure.
Regarding the other person asking about "under the table work"...well, if you are a native English speaker, or close enough, it is possible. But it takes quite a while to network your way into any private work, and expect a 50-75% flake rate on promises from interested parties...often with little or no notice, even after knowing people for quite a while. It is a wild goose chase, basically, with the occasional pretty well paying gig that might last a few months or something. But in a city the size of Seoul, you may end up spending much more time commuting to get to a lesson, making even pay of 40-50+ an hour questionable, all things considered.
At one time, as you've probably heard or read, Korea was a gold mine, with strangers requesting lessons, paying even up to like 100 an hour, etc. But that was 10 years ago...rates are continually falling, competition from others and endless schools, online courses, Skype based tutors working for peanuts....After trying for a while you will see it isn't easy. The worst part is that Koreans just in general don't value appointments or honor "commitments" ...especially those made to foreignors...so if you don't get the money up front, you absolutely cannot count on it. This is experience talking.
However, private tutoring can be very rewarding experiences, often including gifts, home cooked dinners, charming little kids, and ridiculously easy work at good wages. If you can find them. Good luck, honestly! I hope you can.