I18N minimal

const I18N = {
    fr: {
        comment_button: CFG.button_label || "Commenter",
        overlay_title: "Commenter ce message",
        cancel: "Annuler",
        send: "Envoyer",
        missing_post_id: "ID du message introuvable.",
        posted_toast: "Commentaire publié !",
    },
};
const lang = "fr"; // or détection navigator.language
const T = (k) => (I18N[lang] && I18N[lang][k]) || k;