I have post with title, summary and content, I'd would like manage with localization (french and english), what is the best way to do ? Via database (EAV, belong) or Config/lang ?
That depends who is in charge of the localisation. If that is the developer, and the localisation strings are static, I would use lang files, the default in Fuel.
If the localisation strings are dynamic and edited by the user of the app (so your app has a GUI for localisation), database is probably better.
I though it was necessary to separe the event logic to each of the properties I need (name, summary and content). I want call its EAV container for find localisation.
for exemple for name property in my _event_after_load function :