YOU SAID:

were having a translation party

INTO JAPANESE

翻訳パーティーを開いていた

BACK INTO ENGLISH

I had a translation party.

INTO JAPANESE

私は翻訳パーティーを開きました。

BACK INTO ENGLISH

I have a translation party.

INTO JAPANESE

翻訳パーティーがあります。

BACK INTO ENGLISH

I have a translation party.