我使用i18n-js库。
为了设置其配置，我正在执行以下操作：

export function setI18nConfig(locale = undefined) {
    // Fallback if no available language fits
    const fallback = DEFAULT_APP_LANGUAGE;
    const language =
      APP_LANGUAGES.find((language) => language.locale === locale) ?? fallback;

    const { locale: _locale, isRTL } = language;

    // Clear the translation cache
    translate.cache.clear();

    // Update the layout direction
    I18nManager.forceRTL(isRTL);

    // Set the i18n-js config
    i18n.locale = _locale;
    i18n.translations = { [_locale]: translationGetters[_locale]() };

    // Set moment config
    moment.locale(_locale);

    // Return the appropiate locale
    return _locale;
}

正如你所看到的，为了设置翻译字典，我调用了这个getter：

export const translationGetters = {
    en: () => require("../../../assets/languages/en/translations.json"),
    es: () => require("../../../assets/languages/es/translations.json"),
    fr: () => require("../../../assets/languages/fr/translations.json"),
    it: () => require("../../../assets/languages/it/translations.json"),
    pt: () => require("../../../assets/languages/pt/translations.json"),
};

为了建立后备语言，我只是试图在我的应用程序语言数组中找到给定的locale（函数参数）。

export const APP_LANGUAGES = [
    {
        name: "English",
        locale: "en",
        isRTL: false,
    },
    {
        name: "French",
        locale: "fr",
        isRTL: false,
    },
    {
        name: "Italian",
        locale: "it",
        isRTL: false,
    },
    {
        name: "Portuguese",
        locale: "pt",
        isRTL: false,
    },
    {
        name: "Spanish",
        locale: "es",
        isRTL: false,
    },
];

如果它不在列表中，那么我使用DAFAULT_APP_LANGUAGE作为翻译。

export const DEFAULT_APP_LANGUAGE = APP_LANGUAGES[0];

这是设置i18n.js回退的典型或正确方法吗？
有没有简单的办法？
我是说，就像：

i18n.fallbackLanguage = "en";
i18n.locale = locale;
i18n.translations = {
    [locale]: translationGetters[locale](),
    [fallbackLanguage]: translationGetters[fallbackLanguage]()
};

注意：我还需要设置回退的isRTL配置！