YOU SAID:

I am having a simple party

INTO JAPANESE

私は簡単なパーティーをしています

BACK INTO ENGLISH

I am having an easy party

INTO JAPANESE

私は簡単なパーティーを持っています

BACK INTO ENGLISH

I have an easy party

INTO JAPANESE

簡単パーティーをあります。

BACK INTO ENGLISH

Easy party.

INTO JAPANESE

容易な党。

BACK INTO ENGLISH

Easy party.