Well, it's strange, I noticed that I had no more Froala in both languages, so I suspected a problem that comes from him.
Before the update, I took the precaution of making a clone and testing the update on it before applying it on my production site.
On the test site, I did not have the same problem.
So as I suspected froala, I replaced the froala folder of my production site with the froala folder of my test site and the problem is now solved.
Something is going wrong during the update of my production site at the level of froala. I do not know what, I did not get an error message, finally it's solved.