YOU SAID:
julia's car broke down because she is an idiot and doesn't use it correctly
INTO JAPANESE
彼女はばかであり、それを正しく使用していないため、ジュリアの車が故障しました
BACK INTO ENGLISH
Julia's car broke down because she was an idiot and not using it correctly
INTO JAPANESE
ジュリアの車が故障したのは、彼女がばかで、正しく使用していないためです
BACK INTO ENGLISH
Julia's car broke down because she was stupid and not using it correctly
INTO JAPANESE
ジュリアの車は、彼女が愚かで正しく使用していないために故障しました
BACK INTO ENGLISH
Julia's car broke down because she was stupid and not using it correctly
That didn't even make that much sense in English.