YOU SAID:
hello world, merry christmas
INTO JAPANESE
こんにちは世界、メリークリスマス
BACK INTO ENGLISH
Hello world, Merry Christmas
INTO JAPANESE
こんにちは、メリークリスマス
BACK INTO ENGLISH
Hello and Merry Christmas
INTO JAPANESE
こんにちは、メリークリスマス
BACK INTO ENGLISH
Hello and Merry Christmas
Come on, you can do better than that.