I still say it's probably in Greek, I've known plenty of girls that would easily confuse Latin and Greek, even if if was their own houses' motto
look for words like friendship,honor,loyalty,harmony,knowledge, beauty etc... and derivatives or synonyms. Things that would represent what the house stood for, and strive to be. All greek houses have secret handshakes/mottos/sayings etc...
Some girls didn't care. I learned the Kappa handshake and the Sigma Kappa handshake and motto. I was drunk, and have since forgotten them, I barely remember my own houses things

They were kind of burnt out on their houses, and seemed bitter about the sorority thing, and their experience in their own houses.
Guys in my house might have burnt out, but afaik, didn't go around telling our secrets.