"O how She′shach has been captured, How the Praise of the whole earth has been seized! How Babylon has become an object of horror among the nations!" (Jeremiah 51:41, Revised NWT, 2013)
NWT footnote states: "This appears to be a cryptographic name for Babel (Babylon)."
“See how Babylon has been captured! See how the pride of the whole earth has been taken!
See what an object of horror Babylon has become among the nations!" (Jeremiah 51:41, NET Bible)
"Heb 'Sheshach.' For an explanation of the usage of this name for Babylon see the study note on Jer 25:26 and that on 51:1 for a similar phenomenon. Babylon is here called 'the pride of the whole earth' because it was renowned for its size, its fortifications, and its beautiful buildings" (Footnote in NET Bible).