Mes feuilles du bas continu de jaunir et sa se propage en haut que dois je faire? Une carence en azote? Un sur arrosage peut être mais vont elles se remettre?
If they're turning yellow and pluck off easily or fall off then that's usually fairly advanced N deficiency. There's not usually any luck saving those few leaves. But you can save the rest of the leaves that maybe only went a little yellow.
Just give it a normal regimen of nutrients and double check that your ph is in the right range and she should pull through without problem.
Happy growing. ✌️