Contradiction with Genesis 11:7-9
This verse describes the confusion of languages at Babel, whereas Acts 2:11 illustrates understanding through different languages.
Genesis 11:7-9: Go to, let us go down, and there confound their language, that they may not understand one another's speech.
Contradiction with 1 Corinthians 14:22
This verse states that tongues are a sign for unbelievers, contrasting Acts 2:11 where believers understand the message.
1 Corinthians 14:22: Wherefore tongues are for a sign, not to them that believe, but to them that believe not: but prophesying [serveth] not for them that believe not, but for them which believe.
Contradiction with Matthew 13:13
In this verse, people hear but do not understand, unlike in Acts 2:11 where comprehension occurs.
Matthew 13:13: Therefore speak I to them in parables: because they seeing see not; and hearing they hear not, neither do they understand.
Contradiction with Isaiah 28:11-12
This passage speaks of God communicating through foreign tongues as a judgment, contrary to the positive revelation in Acts 2:11.
Isaiah 28:11-12: For with stammering lips and another tongue will he speak to this people. [stammering...: Heb. stammerings of lip] [will...: or, he hath spoken]