I'm excited!

I'm going to go to Korea tomorrow! It's staff' excursion. I'll be back to Japan on Sunday. So this trip is really short. Even though this is the first time for me to visit there. So I'm excited now. I'll eat a lot!
By the way, I was thinking I would buy some kimch as a souvenir. But, on TV, lately they've said the fact was found that there were vermins in the kimch made in Korea. Ahhh...Why are there such stuff in it? Hmmm...I'm wondering if I should buy it...but I'll eat it there.
By the way, should I learn Korean? Recently I was busy so I haven't been thinking aout this trip so much. So I didn't try to learn it. But I'll learn just greeting words from now. To greet in local language is etiqutte, I think. Now I know just hello in Korean...(I think now in Japan many people know it though...) To the truth, I'm expecting Korean people would understand Japanese somewhat in sightseeing place. Because recently many Japanese women who loves Korean actors enthusiastically visit Korea. So I'll meet many Japanese people even in Korea.
Anyway I'll enjoy this trip!!
!!! In what language will I be asked at immigration officer, I wonder?