YOU SAID:
costume party tonight at my house we should wear matching costumes
INTO JAPANESE
今夜は私の家で仮装パーティー、お揃いの衣装を着ようね
BACK INTO ENGLISH
Costume party at my house tonight, let's wear matching outfits
INTO JAPANESE
今夜はうちで仮装パーティー お揃いの服を着て行こう
BACK INTO ENGLISH
Tonight we'll have a costume party at home Let's wear matching clothes
INTO JAPANESE
今夜はお家で仮装パーティーしよう お揃いの服を着て行こう
BACK INTO ENGLISH
Let's have a fancy dress party at home tonight Let's wear matching clothes and go
INTO JAPANESE
今夜はお家で仮装パーティーしよう お揃いの服を着て出かけよう
BACK INTO ENGLISH
Let's have a costume party at home tonight Let's wear matching clothes and go out
INTO JAPANESE
今夜はおうちで仮装パーティーしよう お揃いの服を着て出かけよう
BACK INTO ENGLISH
Let's have a costume party at home tonight Let's wear matching clothes and go out
That didn't even make that much sense in English.