YOU SAID:
Hi, it is a wonderful day if I do say so myself!
INTO JAPANESE
こんにちは、私がそう言うならそれは素晴らしい日です。
BACK INTO ENGLISH
Hi, that's a great day if I say so.
INTO JAPANESE
こんにちは、私がそう言えばそれは素晴らしい日です。
BACK INTO ENGLISH
Hi, I would say that is a great day.
INTO JAPANESE
こんにちは、私はそれが素晴らしい日だと言うでしょう。
BACK INTO ENGLISH
Hi, I will say that is a great day.
INTO JAPANESE
こんにちは、私はそれが素晴らしい日だと言うでしょう。
BACK INTO ENGLISH
Hi, I will say that is a great day.
That didn't even make that much sense in English.