In Genesis 11:6, God sees their unified language and declares nothing impossible for them, setting up the judgment.

Genesis 10:5 already lists nations by language, creating tension with the one-language claim here; it's a narrative foreshadowing.

Genesis 10:20 also mentions languages in the Table of Nations, prefiguring the division at Babel.

Isaiah 19:18 prophesies a future unity of language in Egypt worshiping God, reversing Babel's confusion.

Acts 2:6 at Pentecost reverses Babel: each hears in his own language, undoing the confusion.

Zephaniah 3:9 promises purified lips for all peoples to call on the Lord, the opposite of Babel's confusion.