localeAlias is broken

[fermmm]

I'm trying to make this work:

   locales(app, {
      defaultLocale: 'en',
      localeAlias: {
         es: 'es_AR',
         en: 'en_US',
      }
   });

Whatever I send in "Accept-Language" header parameter: "es", "es_AR" or "en_US" always loads the defaultLocale language, only when I completely remove localeAlias setting then I can set "es" in the header and the language changes otherwise I'm stuck with defaultLocale

It seems to be totally broken. Also what happens if I want 2 aliases for "es"?, since it's not possible to repeat keys in an object, maybe I should invert key values but that doesn't work and it's not how it's documented in the readme.

[chinfeng]

Same for me.