Yep, it’s work. Thanks.
I think I have an initial response.
For the “/theme…/languages” directory, compiles correctly poedit translation fr_FR.mo (666ko) .On the translation of the site /theme…/languages/fr_FR are taken into account.
In the directory “/sitesao-core…/languages” poedit seems not compile translation fr_FR.mo (1kB).
It comes from me or is it default.po corrupted file?