Not to mention there is no reason to use keywords if pop-up window over the one already displays full answer. Easier then put it in dialogue window so you can use arrow keys as well to navigate?
But there is a reason: some people argue that they have issues with walls of text. The hovering text with the full line could please players who want to know the exact line, and the keyword to the ones that do not want to read and prefer a reliable keyword/paraphrasing.
EDIT: By the way, it's a shame that the game is not going to have spanish traduction. Not for me, I dodn't have a problem with that, but certainly it will seriously diminish any impact the game could have here. Press and players are very touchy when it comes to this topic T_T
