YOU SAID:

I’m going to go crash a party, want to join?

INTO JAPANESE

パーティーに行きますが、参加しますか?

BACK INTO ENGLISH

I'm going to a party, would you like to attend?

INTO JAPANESE

私はパーティーに行きますが、あなたは出席しますか?

BACK INTO ENGLISH

I'm going to a party, will you attend?

INTO JAPANESE

私はパーティーに行きます、あなたは出席しますか？

BACK INTO ENGLISH

I'm going to a party, will you attend?