We can also say that language is a domain of recursive linguistic co-ordinations of actions, or a domain of second-order linguistic co-ordinations of actions. We human beings also co-ordinate our actions with each other in first-order linguistic domains, and we do so frequently with non-human animals.

p. 48 as cited in: Vincent Kenny (1989) "Life, the Multiverse and Everything; an Introduction to the Ideas of. Humberto Maturana". - Reality; The Search for Objectivity or the Quest for a Compelling Argument (1988)