Following are a number of back-translations as well as a sample translation for translators of Joel 1:13:

• Kupsabiny: “Put on clothes of mourning
  and be in mourning, oh priests.
  You who are in charge of sacrifices shout loudly.
  Come (plur.) and mourn until daybreak
  you who serve God.
  The wheat and wine is finished
  those that were given (as gifts) to come to the Home of God.” (Source: Kupsabiny Back Translation)
• Newari: “Oh you priests, put on sackcloth,
  cry and weep, beating your chests!
  cry out oh servants who minister at the altar!
  Oh my servants, put on sack cloth and mourn the whole night!
  Because grain and drink offerings
  are no longer brought to the LORD’s temple.” (Source: Newari Back Translation)
• Hiligaynon: “‘You (plur.) priests who serve at the altar of my God, [you (plur.)] put-on sackcloth and go to the temple and weep/cry for the entire/whole night. For there-are-no more grains and wines to be-offered in the temple of your (plur.) God.” (Source: Hiligaynon Back Translation)