en_tn/rev/18/02.md

Fallen, fallen is Babylon the great

The angel speaks of Babylon having been destroyed as if it had fallen. See how you translated this in Revelation 14:8. (See: rc://en/ta/man/jit/figs-metaphor)

She has become

The pronoun "she" refers to the city of Babylon, which is spoken of as if it were a prostitute. (See: rc://en/ta/man/jit/figs-personification)

a prison

The word "prison" here is a metaphor for a secure place. This was probably a secure place where the unclean spirits feel safe, such as a refuge or hideout. Alternate translation: "a hideout" (See: (rc://en/ta/man/jit/figs-metaphor)