Omne ignotum pro magnifico(30): Latin: whatever is unknown is held to be magnificent
partie carree(48): French: "partie" means party or game. "carree" means square or square-shouldered. From the context my guess is that this literally means "a square party," that is, enough people to play a game and in the case of the context it looks like cards.
L'homme c'est rien—loeuvre c'est tout(52): French: "man is nothing—work is everything"
Millstone Education: World Literature / http://www.millstoneeducation.com/worldLit