Paratge denoted a whole world-view, almost a philosophy, as alien to the modern mind as it was to the medieval French Crusaders. The word meant something more than honour, courtesy, nobility, chivalry or gentility though our concepts of honour, courtesy, nobility, chivalry and gentility all owe something to the concept of "paratge".
The word also carried implications of balance, natural order, and what is right.
The nearest concept to paratge we know of elsewhere seems to be the ancient Egyptian idea of Ma'aht - another untranslatable word carrying suggestions of right, cosmic balance and natural order to which may be added ideas of contentment, joy and light. (Ma'aht was embodied as a goddess, and played a part in the development of Christian concepts of heaven and hell). In the modern world, the nearest we can come to it is probably in Eastern philosophies: the yin-yang and the Buddhist ideas of karma and what is "right".