A common misinterpretation applies this verse directly to the New Testament gift of speaking in tongues as a sign for unbelievers, as Paul quotes it in 1 Corinthians 14:21, but ignores the original context of judgment through foreign invaders' unintelligible speech rather than edifying spiritual gifts; others wrongly see it as endorsing gibberish-like utterances today, overlooking its role as a punitive measure for Israel's refusal to heed straightforward prophecy.
Isaiah 28:11
King James Version (1769)
11 For with stammering lips and another tongue will he speak to this people.
Isaiah 28:11 prophesies God's judgment on wayward Israel, declaring that since they rejected His clear words through prophets, He will speak to them through stammering lips and another tongue—referring to foreign conquerors like the Assyrians whose language they would not understand, serving as a sign of divine rebuke and the failure of their self-reliant mockery of God's messages.