What's in it?

traditionally: 전통적으로, 예전에는, 

by tradition: 구전 되어서 내려오다.

have Chuseok : 추석을 맞이하다.

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It's a rice cake we eat on Chuseok. Here. try one.

what's it in? (안에 뭐가 들어간거야?)

Most likely brown sugar and sesame seeds.

(아마도(가장 확률이 크다) 흑설탕 이랑 참깨)

sesame oil: 참기름

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What else did you buy?

What else did you need?

What else will we eat on ChuSeok.

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We will have some traditional Korean pancakes called 전.

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could still: 그래도 ~할 수 있다.

She could still have allergic reaction.

They could still cancel the plan.