If you downloaded DisplayFusion 12.0 and are having issues with languages please re-download and re-install. We have repacked the release as 12.0c with the languages fixed.
It's definitely possible, the colour modes that were included were the only ones that were requested. Would you have a use for inverted colours? They tend to look a bit crazy to my eyes.
Personally I love em. Inverted colours just look really cool to me. That and I have a few pictures that are inverted, so it would be really fun to randomly see the correct colors amidst all the inversions.
