I think it is important to convey the Frnech notions as closely as possible.
In the French baccalauréat system, if you average 10 out of 20, you pass.
Thereafter:
If you pass with 10-11.99, you are awarded a grade ("mention") of "passable".
If you pass with 12-13.99, you are awarded a grade of "assez bien".
If you pass with 14-15.99, you are awarded a grade of "bien".
If you pass with 16-18, you are awarded a grade of "très bien".
Above and beyond that, you get the "félicitations du jury".

For those who achieve an overall result of less than 10/20 but more than 8/20, they have a chance to go to the "oraux de rattrapage", the "épreuves du second groupe" which is a sort of second session, not of written exams, but oral form. Depending on various criteria, students can chose which subjects to submit for the oral in order to make up the missing points to then obtain a pass. If they don't obtain the necessary number of points, which will be different for each student, then too bad; they've failed.

There is no direct UK equivalent of a second sitting, no resits, just this oral "rattrapage". It does have a similar effect though as if you just missed the mark, it is a means to scrape through and avoid having to repeat a year.

Those who did not get an overall average at the first session are not able to go for the "rattrapages" and have failed. They can try again next year!

Note the punctuation I have used in the EN suggestion, without which the formulation will not make sense.