transformées en

turned into

→ transformer
phrase Rare #47,592
turned into Used for things that have been changed or converted into something else. The ending -ées agrees with a feminine plural subject.
FR: Les pommes sont transformées en jus.
EN: The apples are turned into juice.

Les feuilles étaient transformées en papier.

The leaves were turned into paper.

Transformées en quoi ?

Transformed into what?

— Kin-dza-dza! (1986)

Leurs jambes désormais superflues se sont transformées en queue de poisson.

Their now-superfluous legs transformed into a fish tail.

— The Mermaid (2016)

Les fraises peuvent être transformées en confiture.

Strawberries can be made into jam.