Currently all CPL files say "Properties for...". Under Windows it says "... Properties". For example, in ReactOS, mmsys.cpl says Properties for Sound and Audio Devices". XP and 2K3 say Sounds and Audio Devices Properties. It also keeps the header text smaller and neater.
See here for an XP example: http://pcauthorities.com/images/sound-volume.jpg
If I messed up any translation, please tell me what it should be and what language and I will fix it.