I read Ender's Game about a year ago, and saw the movie shorty after. In the book the aliens are always addressed as "Buggers", however in the movie they are always called "The Formic". What was the reason for the change for the movie? I haven't read any of the other books yet, but in the other books do they start calling Buggers Formic too, or is that name specific to the movie?
It sounds like "Buggers" would be a slang term, while "Formic" might be a more scientific term. But, it seems out of place for the movie to change to only using a more scientific term especially when for children it would be more natural to say the slang term.