YOU SAID:
the peacock flew before sunset over the mountain
INTO JAPANESE
ピーコックは山の上の日没前に飛んだ
BACK INTO ENGLISH
Peacock flew before sunset at the top of the mountain
INTO JAPANESE
ピーコックは山の頂上で日没前に飛んだ
BACK INTO ENGLISH
Peacock flew before sunset at the top of the mountain
That didn't even make that much sense in English.