YOU SAID:
My best friend is a cow and she likes to go party.
INTO JAPANESE
私の親友は牛で、彼女はパーティーに行くのが好きです。
BACK INTO ENGLISH
My best friend is a cow and she likes to go to parties.
INTO JAPANESE
私の親友は牛で、彼女はパーティーに行くのが好きです。
BACK INTO ENGLISH
My best friend is a cow and she likes to go to parties.
That didn't even make that much sense in English.