YOU SAID:
Let's go to a superhero party
INTO JAPANESE
スーパー ヒーローのパーティへ行こう
BACK INTO ENGLISH
Go to super hero party
INTO JAPANESE
スーパー ヒーローのパーティへ行く
BACK INTO ENGLISH
Go to a party of superheroes
INTO JAPANESE
スーパーヒーローのパーティーに行く
BACK INTO ENGLISH
Go to a party of superheroes
That didn't even make that much sense in English.