How to make language selection in Laravel?

Question

Laravel

I am making one site and I need to make it multilingual, I found this code in the official Laravel 8 documentation:

use Illuminate\Support\Facades\App;

Route::get('/greeting/{locale}', function ($locale) {
    if (! in_array($locale, ['en', 'es', 'fr'])) {
        abort(400);
    }

    App::setLocale($locale);
});

As I understand it, it needs to be pushed into the web.

I did this and everything seems to be fine, the main one is translated, but the rest of the pages do not work in a different localization, I am already silent about the fact that the login does not open the page at all.

I eventually realized that "/" and "/ru" need 2 different routes, and I did it like this

Route::get('/', function () {
    return view('welcome');
});

Route::get('/{locale}', function ($locale) {
    if (! in_array($locale, ['en', 'ru'])) {
        abort(400);
    }

    App::setLocale($locale);
});

But, as I wrote earlier, everything except these two routes does not work at all. How to do it correctly, tell me (of the documentation did not explain this point at all).

Answer 1

I wouldn't try to support paths with and without language.
I think it's enough to / redirect to / ru, as habr.com does, for example, and all other links should always be done with the language.
Those. /en/posts/1 is fine, but /posts/1 is already an error.
Further, I would wrap everything, in general, all the routes in a group

Route::prefix('{lang}')->group(function () {
  //...
});

After that, I would write a middleware that takes the language code from the request and sets the locale.
And also, because language is a parameter in path, then for a non-existing language it is necessary to give the code 404, not 400.

Answer 2

At one time, I used this package for this purpose in a small project:
https://github.com/mcamara/laravel-localization