You are running the esm-bundler build of vue-i18n. It is recommended to configure your bundler to explicitly replace feature flag globals with boolean literals to get proper tree-shaking in the final bundle. ·
I18n: How to Build a Multi-Language Vue 3 App
vue-i18n-starter - Codesandbox
Vue 3 i18n: Building a multi-language app with locale switcher
javascript - Vue 3 i18n issue: The message format compilation is not supported in this build - Stack Overflow
How to translate your Vue.js 3 application with vue i18n