Composition API for Vue 2
Composition API is supported from Vue 3, and you can use the official
@vue/composition-api plugin to make the Composition API available to Vue 2.
Vue I18n Composition API is also available in Vue 2 using the
About how to usage, See the here
@intlify/vue-i18n-composable allows the main API of Vue I18n v8.x to work with the Composition API. All of Composition API provided in Vue I18n v9 are not available.