@jeremyecrawford I thought this was answered somewhere but my search skills are failing. Is Eyes of the Rune Keeper intended to let you read/understand codes, such as numeric ciphers or Thieves' Cant jargon?
— Dan Dillon (@Dan_Dillon_1) December 14, 2017
Eyes of the Rune Keeper lets you read all writing. That doesn't mean you understand a secret code being delivered by that writing. For example, you might read, "Sunset Dog Potato," and have no idea that's code for something. #DnD https://t.co/MAYJZOZnLH
— Jeremy Crawford (@JeremyECrawford) December 15, 2017