Why does the fox say that he does not speak?

The fox says he does not speak in the context of the children’s song “What Does the Fox Say?” by Ylvis. The song humorously plays with the idea that while many animals have distinct sounds, the sounds of a fox are less well-known, leading to playful and absurd interpretations of what a fox might say. The line emphasizes the mystery and intrigue surrounding the animal rather than a literal statement.