YOU SAID:
It's raining cats and dogs outside on this brilliant day.
INTO JAPANESE
この素晴らしい日には外で猫や犬が雨が降っています。
BACK INTO ENGLISH
Cats and dogs are raining outside on this wonderful day.
INTO JAPANESE
この素晴らしい日には、猫や犬が外で雨が降っています。
BACK INTO ENGLISH
On this wonderful day, cats and dogs are raining outside.
INTO JAPANESE
この素晴らしい日には、猫と犬が外で雨が降っています。
BACK INTO ENGLISH
On this wonderful day, cats and dogs are raining outside.
That didn't even make that much sense in English.