YOU SAID:
Woohoo! This party is awesome!
INTO JAPANESE
やったー!このパーティーは最高です!
BACK INTO ENGLISH
Yay! This party is the best!
INTO JAPANESE
わーい!このパーティーは最高です!
BACK INTO ENGLISH
Hooray! This party is the best!
INTO JAPANESE
やった!このパーティーは最高です!
BACK INTO ENGLISH
Hooray! This party is the best!
That didn't even make that much sense in English.