Following are a number of back-translations as well as a sample translation for translators of Deuteronomy 14:21:

• Kupsabiny: “Do not eat any animal that died. You may give it to a foreigner who lives in your city to eat, or you may sell it to a person from another community. It is like that because you are people who have been set aside to be clean with respect to your God.
  Do not cook a kid of a goat in the milk of its mother.” (Source: Kupsabiny Back Translation)
• Newari: “You are not to eat an animal that has died a natural death. It’s OK for you to give it to a foreigner to eat or you can sell it into the hand of a foreigner. You, however, are a holy nation for the LORD your God.
  The young of a female goat must not be cooked in its mother’s milk.” (Source: Newari Back Translation)
• Hiligaynon: “‘You (plur.) do- not -eat any animals that is dead already. You (plur.) can give or sell it to the non Israelinhon who live in your (plur.) towns, and they will-eat it. But you (plur.) on-the-other-hand never to eat it, for you (plur.) people were-set-apart for the LORD your (plur.) God.
  ‘You (plur.) do- not -cook a goat in its mother’s milk.” (Source: Hiligaynon Back Translation)
• English: “‘o not eat any animal that has died naturally, because its blood has not been drained out. You may allow foreigners who live among you to eat those things or you may sell them to other foreigners. But you belong to Yahweh our God; and those who belong to him are not permitted to eat the meat of animals whose blood has not been drained out.
  ‘You must not cook a young sheep or goat in its mother’s milk.’” (Source: Translation for Translators)