One of the big differences are the silent letters.‎ Take the word duvet. Even English speakers say this word like French speakers. They don't pronounce the 't' at the end - 'duvay'‎.

On phonetic grounds, a case can be made for either pronunciation ... We started to use 'g' in the French way, while another letter (the insular g) took over spelling for the other sounds, before ...

One of the big differences are the silent letters.‎ Take the word duvet. Even English speakers say this word like French speakers. They don't pronounce the 't' at the end - 'duvay'‎.