The romanophone event is like a cross between king of the arena and the romanophone boxes found in adventure mode. You and your opponent are on a platform with different colored Roman soldiers. You must hit the same color soldier as the note shown for you. If you can finish your 'tune' before your opponent you will win.
Things to remember:
The Red soldier will always be in the middle of the platform. The Blue, Green and Yellow soldiers travel clockwise around the edges of the platform, stopping for brief moments at the corners.
If you hit the wrong color Roman, you'll be sent back a couple of notes, so try to always hit the correct Roman.
This achievement can only be done in Olympic Mode.