A special instance of Sesquipedalian Loquaciousness and Altum Videtur, and a perfect way to introduce that a character is not only smart, but refined, well- (formally) educated, and upper-class, even aristocratic: have him be able to recite a Latin quotation eloquently or read the moribund language of the Romans as if it were his native tongue.
Supposedly, this demonstrates that the character is [...] [tvtropes.org]