YOU SAID:
This is a splendid day!
INTO JAPANESE
これは素晴らしい日です!
BACK INTO ENGLISH
This is a great day!
INTO JAPANESE
素晴らしい一日だ
BACK INTO ENGLISH
This is a great day.
INTO JAPANESE
素晴らしい一日だ
BACK INTO ENGLISH
This is a great day.
That didn't even make that much sense in English.