Jin smuggling large amount of cash + Sun doesn't speak up

At customs at LAX, Jin is bein questioned about the watch he is brought to the country and doesn't/can't answer questions and just points at a letter from Paik Industries. The customs agent goes through his bag, and discovers a large amount of cash ($10,000 bundles). An agitated Jin is taken to another room for questioning, while Sun is to be taken to a waiting room. The female agent asks her is she speaks English, but she says no.

So, in this timeline, does Sun know English and just doesn't want to reveal it, or did she never learn English? Also, was the cash a part of Jin's original plan for Sun and he to start a new life in America?