After the Chosen One destroyed the Enclave Oil Rig, they will comment on it.
After becoming a Citizen, other Citizens in Vault City will have among their flavor texts the phrase "I'm feeling double plus good. And you?" This is a direct use of Orwellian Newspeak. Use of Newspeak in modern media is a trope often employed to identify a "utopian" society which is later revealed as a dystopia, having at its core flawed, selfish, or ultimately nefarious motivations.