Localization is a key part of modern web apps, especially if your users are from different parts of the world and speak different languages. When you make APIs with Laravel, you often need to send back responses in more than one language, depending on what the user wants. Laravel has a great localization system that makes it simple to translate the content of your app.
Using middleware is one of the best ways to add REST API localization to Laravel. Middleware lets you stop incoming API requests, check for language preferences, and set the application language on the fly before the request gets to the controller.