The phrases that are translated as “clean animals” and “unclean animals” in English: The first draft into Maan had “animals not cursed” and “cursed animals,” which did not express correctly the idea of ritually pure and impure animals. So it was changed to “animals accepted by God for sacrifices” and “animals not accepted by God for sacrifices.”
In Kwere it is translated as animals “which are eaten” vs. “which are not eaten.” (Source: Pioneer Bible Translators, project-specific translation notes in Paratext)
In Makonde is is translated as halali and halamu, derived from the Arabic halal (حلال) and haram (حرام), used for permitted and and forbidden animals in Islam. The Makonde speakers are 90% Muslim and this was chosen because these are widely understood terms and because many of the permitted (clean) foods of Judaism and Islam match. (Source: Pioneer Bible Translators, project-specific translation notes in Paratext)