希望这段代码对你有用。

• • 主计长**

public function index($locale) 
  {
      session(['locale' => $locale]);
      App::setLocale($locale);
      return Redirect::back();
   }

• • 语言中间件：**

public function handle($request, Closure $next)
    {
        if (Session::has('locale')) {
            App::setLocale(Session::get('locale'));
        }
        else { // This is optional as Laravel will automatically set the fallback language if there is none specified
            App::setLocale(Config::get('app.fallback_locale'));
        }
        return $next($request);
    }

• • 路线：**

Route::get('/{lang}', 'LanguageController@index');

最后将您的语言中间件添加到middlewaregroup中的app/Http/Kernal. php

\App\Http\Middleware\Language::class,

我通过在中间件组中添加我的中间件修复了它！

protected $middlewareGroups = [
    'web' => [
        \App\Http\Middleware\EncryptCookies::class,
        \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
        \Illuminate\Session\Middleware\StartSession::class,
        // \Illuminate\Session\Middleware\AuthenticateSession::class,
        \Illuminate\View\Middleware\ShareErrorsFromSession::class,
        \App\Http\Middleware\VerifyCsrfToken::class,
        \Illuminate\Routing\Middleware\SubstituteBindings::class,
        \App\Http\Middleware\Language::class,
    ],

    'api' => [
        'throttle:60,1',
        'bindings',
    ],
];