Translation support

[Mubelotix]

The produced code should look like

    fn t_6517(s: usize, locale: &str) -> &str {
        let default = ["Hello world!"];

        match locale {
            "fr" => if let Some(t) = [Some("Bonjour le monde!")][s] {
                return t;
            },
        }

        return default[s]
    }
    html! {
        <p>
            t_6517(0, locale);
        </p>
    }