Following are a number of back-translations as well as a sample translation for translators of Deuteronomy 32:21:

• Kupsabiny: “They worshipped idols causing me pain
  and they made me jealous on account of useless things.
  I shall make them jealous on account of people who are not Jews
  I will made them angry on account of those who do not know things.” (Source: Kupsabiny Back Translation)
• Newari: “They, by doing puja to gods who are not gods,
  have made my heart jealous,
  and by their useless idols,
  have provoked my anger.
  So now, by a people who are not a people group,
  I will also make their hearts jealous.
  By a foolish nation
  I will provoke their anger.” (Source: Newari Back Translation)
• Hiligaynon: “They caused- me -to-be-jealous with what is not true god,
  and provoked- me -to-anger with their worthless idols.
  Therefore I will-make- them -envious also by the other people-groups.
  I will-make- them -angry by blessing the foolish nation.” (Source: Hiligaynon Back Translation)
• English: “They f + fr 32:21 fq Because they ft heyf*made me very angry because of their worshiping idols, which are not really gods;
  they have caused me to be jealous because I want them to worship only me.
  So now, in order to cause them to become jealous,
  I will send to attack them an army of a nation of worthless and foolish people.” (Source: Translation for Translators)