This is actually SO COOL!
Jeju Island actually has really, really different accents from the rest of Korea (sometimes even using completely different words) This English teacher had his students speak Satoori (accents) and its awesome!
Its really different from typical (ie Seoul) Korean, especially the grammar endings...
I wish I could go - 나도 갔으면 좋겠어요.
(na-do kass-eu-myeon joh-kess-eo-yo)
I wish I could go - 나도 가시민 좋으키여!
(na-do ka-shi-min joh-eu-ki-yeo!)
Check out these idols from Jeju...