en_tn_condensed/isa/42/10.md

Yahweh continues speaking.

and all that is in, the coastlands, and those who live there

"and all the creatures that live in the sea, and all those who live on the coastlands."

Let the desert and the cities cry out

This refers to the people who live in the desert and the cities. (See: rc://en/ta/man/translate/figs-metonymy)

Kedar

This is a city north of Arabia. See how this was translated in Isaiah 21:16

Sela

This is a city in Edom. (See: rc://en/ta/man/translate/translate-names)