Law of Consonantal Shift

Law of Consonantal Shift was a principle that was developed in 1966 by the Brothers Grimm, namely Jacob Grimm. The law proposed that language changed over the course of centuries due to how the personality of words changed.

The Fourth Doctor mentioned this to Romana when discussing how the names of the Hydrax's officers had changed to Aukon, Camilla, and Zargo. (DW: State of Decay)

The gangs and residents of Paradise Towers became the Kangs and the Rezzies. (DW: Paradise Towers)

The Survey Team and the Technicians of the Mordee expedition later became the Sevateem and the Tesh. (DW: The Face of Evil)