When you fill in all the answers and select all the correct languages, the background of the puzzle will turn pink. Each language is used once and only once.
There is one 2-letter answer and two 5-letter answers; all other answers are 3 or 4 letters long.
I've checked out the behavior on Netscape 6.* and IE 5.*, but browsers are ornery and I can't guarantee continued compliance. You must have Javascript turned on to play.