Saru accesses Detmer's helm console, which she believes is depicting Tau Cetian.
Tau Cetian was a language used on a world in the Tau Ceti system.
When the universal translator on the USS Discovery malfunctioned in 2257, several stations on the bridge, including Saru's, Keyla Detmer's and Joann Owosekun's, displayed controls in an alien language. Detmer believed the language was Tau Cetian. (DIS: "An Obol for Charon")