Answer:
The circularity of the heptapod language goes beyond a written form of communication. It is also an expression of the Heptapod cyclical worldview where the past, present, and future can all be seen at the same time. It makes sense that their language would reflect this (at least if Sapir-Whorf had anything to say)
Step-by-step explanation:
Heptapods are a sapient, space-faring extraterrestrial species. After first contact with Humans, two Heptapods, nicknamed Abbott and Costello, attempted to communicate with Dr. Louise Banks and Ian Donnelly from their ship in Montana.