https://www.npmjs.com/package/i18n-js const i18n = new I18n({ en: { greetings: "Hi, %{name}!" }, "pt-BR": { greetings: "Olá, %{name}!" }, }); i18n.t("greetings", { name: "John" }); QA warning in SimpleLocalize: Possible malformed percentage variable The translation contains a '%' character not followed by a valid variable format (e.g., %s, %d, %@). Please check for correct variable syntax.