No, you can't say that.
You can say 'Who is at fault?', or more commonly, 'Whose fault is it?'
2016年5月4日
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yes i got it :)
2016年5月5日
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As a student of Arabic, I would say that Arabic and English prepositions rarely match, so it's better to not try and translate the prepositions directly. I have to learn آمن بشيء and not آمن في شيء and so on.
2016年5月4日
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aha .Thanks a lot :)
2016年5月4日
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Who is "at" fault is more common in legal proceedings.