Laravel中间件不会在每个请求之前运行

我有一个简单的中间件

<?php

namespace App\Http\Middleware;

use Closure;
use Session;
use App;

class SetPageLanguage
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {

        if(Session::has('language'))
        {
            $lang = Session::get('language');

            App::setLocale($lang); // still don't know which one to use, but I'll figure it out ;)
            app()->setLocale($lang);
        }

        return $next($request);
    }
}

它应该在每个请求之前运行。所以我把它添加到内核中:

class Kernel extends HttpKernel
{

    protected $middleware = [

        ...

        \App\Http\Middleware\SetPageLanguage::class, // middleware for setting the language when loading a page
    ];

 protected $routeMiddleware = [

        ...

        'localization' => \App\Http\Middleware\SetPageLanguage::class,

        ...

在每一条路线上都打电话,比如:

Route::GET('/', 'AnonymController@home')->middleware('localization');

我对laravel和Php还很陌生,所以我肯定我不了解一些重要的东西。

如何在每次请求之前运行中间件?