How do you i18n?

[eluser]Référencement Google[/eluser]
I am using the wiki solutions to support the internationalization stuff and sessions, but not hard coding all. It depends the situation and in 1 application I mix between hard coded files and a databse. So I adopted this rule:
- If it's something about website content, like content texts or long sentences, I do that with the DB
- If it's 1 word stuff or small sentence, I use generally hard coded files (ex. forms labels, error and success messages, ...)

I am asking myself too wich is the best solution because I don't like too much to mix things between hard coded and DB, I am feeling that it could be better to really have all in the DB, but haven't tried to find a working solution yet.