Following are a number of back-translations as well as a sample translation for translators of Nehemiah 12:30:

• Kupsabiny: “The priests and the Levites first cleansed themselves and cleansed all the people then they cleansed the gates and the wall.” (Source: Kupsabiny Back Translation)
• Hiligaynon: “The priests and the Levites performed a ceremony of cleaning so-that they will-be-cleansed, and they did the same thing to the people, to the entrance/gates of the city and its stone-wall.” (Source: Hiligaynon Back Translation)
• English: “When they came to Jerusalem, the priests and other descendants of Levi who help the priests performed rituals to cause themselves to be acceptable to God, and then they performed similar rituals to purify the other people, the gates, and the wall.” (Source: Translation for Translators)