YOU SAID:
I'm glad I could join your party today.
INTO JAPANESE
今日私はあなたのパーティーに参加することができてうれしいです。
BACK INTO ENGLISH
I am happy that I can participate in your party today.
INTO JAPANESE
私は今日あなたのパーティーに参加することができてうれしいです。
BACK INTO ENGLISH
I am happy that I can participate in your party today.
That didn't even make that much sense in English.