feat(i18n): fallback to en when i18n is incomplete (#3165)

Author: SkyeYoung

src/config/i18n.ts

@@ -37,6 +37,7 @@ i18n.use(initReactI18next).init({
   ns: ['common'],
   defaultNS,
   resources,
+  fallbackLng: 'en',
 });
 
 export default i18n;