YOU SAID:
Vote to party in your class.
INTO JAPANESE
クラスでパーティーに投票してください。
BACK INTO ENGLISH
Vote for a party in class.
INTO JAPANESE
クラスのパーティーに投票する。
BACK INTO ENGLISH
Vote for class party.
INTO JAPANESE
クラスパーティーに投票します。
BACK INTO ENGLISH
Vote for class party.
That didn't even make that much sense in English.