French: "L'union fait la force" (Unity is strength)
Fake Brit: Siobhan Flynn is Welsh doing an English accent as Melody.
General Trivia:
This is the first time Paige fights a warlock.
Melody, the muse mentions that her and Leo go back a long time. This is probably due to them both watching over the sisters their whole lives.
The episode marks the first time Paige vanquishes a demon on her own by orbing an energy ball back at them, similar to how Prue used her telekinesis to send power back to her opponents.