How to get the configured fallback locale as a string from Vue-i18n?

[jtuchel]

I have a Vue 3 app and use the following configuration

const i18n = createI18n({
  legacy: false,
  locale: "en",
  fallbackLocale: "en",
});

Inside my component I'm using

import { useI18n } from "vue-i18n";

const { locale, fallbackLocale } = useI18n();

where locale.value returns a string, but fallbackLocale.value returns a custom type. https://vue-i18n.intlify.dev/guide/essentials/fallback.html#fallbacking shows that there might be multiple locales but how do I get my configured one? / How can I transform the fallbackLocale.value to a single locale as string?