No worries was referred to as "the national motto" of Australia in 1978,[1] and in their 2006 work, Diving the World, Beth and Shaun Tierney call "no worries, mate" the national motto of the country.[4] Writing in The New York Times Book Review, Annette Kobak calls the expression a "ritual incantation" which has "particular charm".[18] The phrase "no waris" in the Papua New Guinea language Tok Pisin is derived from the Australian English term.[19][20]