Expired question
Some basic vocabular.

I think I will need the following sentences, when I visit my company in Deagu. Could you help me translate them?
I made something with the help of google translate but that s probably junk.

I speak some Korean.
좀 한국어를 구사합니다.

How have you learned that?
어떻게 그런 배웠습니까?

I listen to Korean lessons in the train.
내가 기차 한국 수업을 들어요.

I listen to Korean songs in the train.
내가 기차에서의 한국 노래를 들어 봐.

Why did you learn Korean?
왜 한국 배우셨어요?

It was just a joke to impress and surprise you.
그것은 당신을 감동하고 놀랄 할 수있는 농담이었다.

Now I know how difficult English or Dutch must be for Koreans
지금은 영어 또는 네덜란드 인 한국인을 위해 얼마나 힘드실 지 압니다

I would have learned more if I was sure I wanted to keep this job.
내가이 일을 계속하고 싶어 확신하면 더 배운 것입니다.

(For you interest, no I am not going to say the last sentence to the manager of my company, or even a colleague, I know I will get fired then.)

Could you please also add what the Korean sentences mean literally. I mean could you write the translation back to English, and write the English in the Korean word order, and could you translate the Korean words as literal as possible.

Something like, if you take 'Hello' as example..:

Hello.
안녕하세요
At peace are you? <-- literal translation in Korean word order.