I have read that part of the issue is they can't add extra dialogue windows, so they have to make use of the same space that the other languages use, and English needs more words and letters, so some changes must be made. When it comes to spoken dialogue, they have to keep the same length of time as the other languages as well.
In the specific case of the lancers quest, I thought it was to build suspense for the big shocking reveal at the end.
