The team that translated the New Testament into Paraguayan Guaraní (in the 1960s) had to translate the Greek that is translated as “purification” in English. Jacob Loewen (in The Bible Translator 1967, p. 33ff. ) tells this story:

“An interesting lesson regarding intelligibility grew out of the translation of Luke 2:22 speaking about ‘the days of purification’. Each of the translations carried rather high-flown euphemisms and no one seemed to be satisfied with the euphemism of the other. There was a mother of seven children present at the meeting, and so she was asked to complete the following sentence in what would be publicly acceptable Guarani: I have given birth to seven children. After each childbirth 1 observed a period of . . .. The mother of seven immediately came back with an expression which back-translated into English would mean the ‘forties’. It was a reference to the forty days of purification which local culture required. When the translators were asked how such an expression would sound in Luke 2, one of them objected: ‘Why, if we use that idiom, everybody would know what we are talking about!’ In the discussion that followed, the committee realized that it is the translator’s responsibility to provide a message which will speak the truth clearly.”