Following are a number of back-translations of Romans 9:33:

• Uma: “That stumbling of their is foretold beforehand in the Holy Book long ago. God said like this: ‘Really-really I say: The king I have placed on Sion Mountain I compare-figuratively to a stone. Many people stumble at that stone with the result they fall-flat. But whoever believes in Him, they will not be-made-to-fall.’ [a term used when someone you were counting on "lets you down"]” (Source: Uma Back Translation)
• Yakan: “God hep says in the holy-book, ‘There at the town Siyon I place a stone for the people there to stumble against so that they fall-over. But whoever trusts in this stone they will not regret because of their trust in him.'” (Source: Yakan Back Translation)
• Western Bukidnon Manobo: “For there is a written word of God which says, ‘I will place there in the town of the Jews, which is Zion, a stone. The people will accidentally kick against this and stumble. However, if there’s anyone who trusts in this stone, the place where he ends up will be very good.'” (Source: Western Bukidnon Manobo Back Translation)
• Kankanaey: “This is what that which God caused-to-be-written is talking-about which says, ‘Look, I have erected a stone in Zion which people will be-offended-at and will stumble-over. But whoever believes in him will absolutely not be shamed.'” (Source: Kankanaey Back Translation)
• Tenango Otomi: “There in the Holy Book is written the word which God said: ‘I will put in Sion a stone on which people will stumble. It will be a rock that causes people to fall. But whoever will believe in this stone, never will he have reason to say that it was bad for him to believe.'” (Source: Tenango Otomi Back Translation)
• Huehuetla Tepehua: “Just like it says in God’s Word where it is written. This is what it says: In the town of Zion I have placed the Christ. He is like a stone that one stumbles over. And when one stumbles over him, that one is really lost. It is just as if he fell flat on the ground. But anyone who puts his confidence in the Christ won’t change his mind afterwards.”
• Isthmus Zapotec: “As it is written on that paper where God spoke: I am placing one who will trip the Jews, the people of Zion, but those who believe him will not be disappointed.” (Source for this and above: Waterhouse / Parrott in Notes on Translation October 1967, p. 1ff.)

For the Old Testament quote, see Isaiah 28:16.