I think a great feature to add to each question as an option would be "Tool Tips" a pop up balloon giving you the capability
to type in support for an individual question. In my case I would have used it to put in a different language for each question...
Rather than having to make two separate surveys of one in each language, it would have been much easier to have
English as the primary survey and the tool tips to be in a secondary language.
-- Just a though