YOU SAID:

And, is everyone wearing their Halloween costumes?

INTO JAPANESE

そして、みんなハロウィンコスチュームを着ていますか？

BACK INTO ENGLISH

And are they all wearing Halloween costumes?

INTO JAPANESE

そして、彼ら全員はハロウィーンの衣装を着ていますか？

BACK INTO ENGLISH

And are they all wearing Halloween costumes?