Interesting ... some usages I was not familiar with, but researching them, I found it was only my own ignorance. But it appears you lost the change in the second-to-last line of the song.

Through most of the song, it uses the line:
"Y ya no sé lo que pensar"

which you translated:
"Et je ne sais plus quoi penser"

Okay, fair enough, but in the last rendition, it isn't just a repetition, in place of the previously translated line, it says instead:
"sé que te tengo que olvidar"

which would be rendered:
"Je sais qu'il faut que je t'oublie" or
"Je sais que je dois t'oublier"

or some such. Likewise, the line two lines earlier was changed from:
"Y cae tan fuerte que hasta me quema hasta la piel"

to:
"Pero que rompe, rompe, el corazón"

So, instead of:
"Et tombant si fort qu'elle me brûle la peau"

it should rather say a line of how it breaks, it breaks "mon coeur".

And likewise, 2 line before that again:
"Como aguacero de mayo", your:
"comme une averse de Mai"

becomes the sing-song solfeggio:
"Le lo lay lelo lelo".

That doesn't need to be translated, but it should be included. (This goes to 5 stars when the missing "denouement" gets added).