Not entirely peaceful, but some nuance. The Starbridge Academy series by A.C. Crispin. Starbridge Academy is a university on an asteroid that trains youngsters of many species in a galaxy wide league to become interpreters, ambassadors, and interrelators. An interrelator is a combination of the first two, representing the interests of the species they’re “embedded” with. A near-disaster of a first contact in the first book is what sets the series in motion.
