How to do lazy loading of translations in React? 

Lazy loading of translations in React is a technique that can significantly improve the performance of your application by reducing the initial load time. Instead of loading all translations at once, you can load them on demand as needed, which can save bandwidth and reduce the time it takes for your application to load.

When dealing with multi-lingual applications, loading translations for all languages upfront can result in a substantial amount of data being loaded unnecessarily. This can cause a slowdown in the initial load time of your application, especially for users with slower internet connections or devices with lower processing power.

By lazy loading translations, you can defer the loading of translation files until they are actually needed, improving the initial load time and overall performance of your application.

With a dynamic import(), bundlers such as Vite and webpack split the translation file into a separate chunk that is fetched on demand. The promise resolves with a module object, and the parsed JSON is its default export.

import("./lang/en.json").then(({ default: messages }) => {
  // Handle lazy loaded messages
});