Contradiction with Jeremiah 30:18
Isaiah 34:12 speaks of desolation and no kingdom being declared, whereas Jeremiah 30:18 promises the restoration and rebuilding of cities.
Jeremiah 30:18: Thus saith the LORD; Behold, I will bring again the captivity of Jacob's tents, and have mercy on his dwellingplaces; and the city shall be builded upon her own heap, and the palace shall remain after the manner thereof. [heap: or, little hill]
Contradiction with Isaiah 32:18
This verse conflicts with Isaiah 34:12 by describing peaceful and secure dwellings, in contrast to desolation.
Isaiah 32:18: And my people shall dwell in a peaceable habitation, and in sure dwellings, and in quiet resting places;
Contradiction with Ezekiel 36:35
Contradicts Isaiah 34:12 by stating that desolate lands will become like the Garden of Eden.
Ezekiel 36:35: And they shall say, This land that was desolate is become like the garden of Eden; and the waste and desolate and ruined cities [are become] fenced, [and] are inhabited.