29 Heb “All this land.”
30 It should be noted that the text says that the nations will be subject to the king of Babylon for seventy years, not that they will lie desolate for seventy years. Though several proposals have been made for dating this period, many ignore this fact. This most likely refers to the period beginning with Nebuchadnezzar’s defeat of Pharaoh Necho at Carchemish in 605 b.c. and the beginning of his rule over Babylon. At this time Babylon became the dominant force in the area and continued to be so until the fall of Babylon in 538 b.c. More particularly Judah became a vassal state (cf. Jer 46:2; 2 Kgs 24:1) in 605 b.c. and was allowed to return to her homeland in 538 when Cyrus issued his edict allowing all the nations exiled by Babylon to return to their homelands. (See 2 Chr 36:21 and Ezra 1:2–4; the application there is made to Judah but the decree of Cyrus was broader.)

In other versions

This whole land shall become a ruin and a waste, and these nations shall serve the king of Babylon seventy years.

This whole country will become a desolate wasteland, and these nations will serve the king of Babylon seventy years.

This whole land will become a desolate ruin, and these nations will serve the king of Babylon for seventy years.

This entire land will become a desolate wasteland. Israel and her neighboring lands will serve the king of Babylon for seventy years.

And all this land will become a site of ruins, a desolation, and these nations will serve the king of Babylon seventy years.

And this whole land shall be a desolation, and an astonishment; and these nations shall serve the king of Babylon seventy years.

Public Domain