If you are going to borrow a word from another language, you should spell it that way it is spelled in that language, not put your own interpretation on it because you pronounce it incorrectly or can't be bothered to even try to pronounce it correctly or because you have no respect for the other language.

You therefore either spell it the way it's spelled in French or you drop both accents entirely because English words have no accents. if you make it an English word, then you can't logically have an accent after the second "e". If you do, it is a non-word: neither French nor English, nor any other language.

Message to Americans: please do not attempt to pronounce French words. Unless you have studied French in France or unless you have been taught by native French speakers, please, please, please don't bother. You always get it so, so wrong.

This applies to Americans trying to pronounce the words of any other language. It's really embarrassing to hear when an American tries to be clever and pronounces words of other languages with an American accent.