What does Isaias Chapter 14 say, and which statements belong to its speaker?

Isaias 14 begins with mercy for Jacob and restoration to their ground. Strangers join, people bring them home, and former captors become subject to Israel as servants and handmaids. Rest from hard bondage precedes a parable against Babylon's king: the oppressor's rule ends, earth rejoices, and firs and cedars no longer fear the feller.

Hell's disturbance, rising giants and princes, shared weakness, lowered pride, moth underneath and covering worms lead to the fallen Lucifer image. His heart's intended ascent and likeness to the Most High end in the pit. The edition separately explains the king as the literal subject and the prince of devils as a spiritual interpretation. Viewers recall ruined cities and unopened prisons. Unlike honored kings, he is cast out of his grave, defiled among the slain and excluded from their burial. His children face slaughter for their father's iniquity. Babylon loses name, remains, bud and offspring; ericius and pools accompany its sweeping destruction. No more specific animal identity is supplied.

The Lord's oath then concerns Assyria's destruction in his land and removal of burden and yoke. In Achaz's death year, Philistia is warned not to rejoice over a broken rod: serpent, basilisk and seed swallowing the bird continue the image. The poor feed while famine destroys the hostile root and remnant. Smoke comes from the north without escape from its troop. Envoys receive the answer that the Lord founded Sion and his people's poor hope in him.