Remix-i18next doesn't support arrays as fallback languages

[Loschcode]

When using remix-i18next I add the following

export default {
  supportedLngs: ["es-MX", "en-US"],
  fallbackLng: {
    "es-MX": ["es", "en-US"],
    default: ["en-US"],
  },
};

I then use that configuration on the i18next.server.tsx

const i18next = new RemixI18Next({
  detection: {
    supportedLanguages: i18n.supportedLngs,
    fallbackLanguage: i18n.fallbackLng,
  },

However, it doesn't seem to be supported, fallbackLanguage will yield an error and complain that it's not a string and of course it won't complain and work perfectly when using en-US as simple fallbackLanguage

This is quite weird for me since i18next let you do just that out of the box. It's essential if you want to support multiple different Spanish or English versions for example and want a fallback in what you want to be the most neutral for your project.

I don't think it's a bug, it may be on purpose, but why is that? Or maybe there's something I didn't quite figure out.

[sergiodxa]

Because:

1. I didn't know i18next could do that
2. Those options while similar to i18next, are used by the remix-i18next LanguageDetector class that works fully server-side and doesn't really depend on i18next.