“…The second additional notion surfaces in various corners of the literature, including work on syntactic iconicity, sound symbolism, language typology, and “non‐functional” behavioral traditions in primates. On this notion, a sign‐function mapping can be characterized as arbitrary as long as it is not motivated by broader structural or adaptive factors (e.g., Croft, 2003; Givón, 2001; Haiman, 1983; Klamer, 2002; Nielsen & Dingemanse, 2021; Nielsen & Rendall, 2019). In Chapter 5 of his (1916), de Saussure himself proposed to view the level of arbitrariness of a word‐meaning mapping as an inverse function of how “motivated” (fr.…”