The Greek and Hebrew that is translated as “doubt” in English versions is translated with a term in Tzeltal that means “heart is gone.” (Nida 1952, p. 122)
In other languages it is represented by a variety of idiomatic renderings, and in the majority of instances the concept of duality is present, e.g. “to make his heart two” (Kekchí), “to be with two hearts” (Punu), “to stand two” (Sierra de Juárez Zapotec), “to be two” or “to have two minds” (Navajo), “to think something else” (Tabasco Chontal), “to think two different things” (Shipibo-Conibo), “to have two thoughts” (Yaka and Huallaga Huánuco Quechua), or “two-things-soul” (Yucateco).
In some languages, however, doubt is expressed without reference to the concept of “two” or “otherness,” such as “to have whirling words in one’s heart” (Chol), “his thoughts are not on it” (Baoulé), or “to have a hard heart” (Piro). (Source: Bratcher / Nida, except for Yucateco: Nida 1947, p. 229 and Huallaga Huánuco Quechua: Nida 1952, p. 123)
In Chokwe “kwalajala is ‘to doubt.’ It is the repetitive of kuala, ‘to spread out in order, to lay (as a table), to make (as a bed),’ and is connected with kualula ‘to count.’ [It is therefore like] a person in doubt as one who can’t get a thing in proper order, who lays it out one way but goes back again and again and tries it other ways. It is connected with uncertainty, hesitation, lack of an orderly grasp of the ‘count’ of the subject.” (Source: D. B. Long in The Bible Translator 1952, p. 87ff.)