If I want to translate that:
<-- EZEki3l has quit (NickServ (GHOST command used by X-]))
<Global> NickServ: `-_ZzZ_-`!Bouh@host.tld logged out nickname `-_ZzZ_-`
* *** Global -- from OperServ: `-_ZzZ_-` added an SQLINE for *eoijgzeoigjezoigjoizegj* (does not expire)
and all other events that users and staff can see on IRC server
You think it's possible to replace this with a module ?
And
impossible to translate that without going over all of the code and replacing all alog()'s by a replacement
It exactly what I want but if it cause anope doesn't work right or if devellopers prefer don't modify this part I understand that it's not possible

But the languages files fr.l and en_us.l and other I think must be updated because the vocabulary is not exactly right or it need changes with new/old features like memoserv notify mail/nomail and may be other things
I will update fr.l and post a link when I will finish