laravel_route.php

<?php

$country = Request::segment(1);
$locale  = Request::segment(2);

if (Schema::hasTable('countries')) {
    $Country = \App\Countries::where('name_iso3166', $country)->get();
    
    if (count($Country)) {
        $available_lang = explode(',', $Country[0]['available_languages']);
    } else {
        $available_lang = Config::get('app.available_lang');
    }
    
    if (in_array($country, Config::get('app.available_countries')) && in_array($locale, $available_lang)) {
        \App::setLocale($locale);
    } else {
        $country = null;
        $locale = null;
    }
}

Route::group(['middleware' => 'web', 'prefix' => "$country/$locale"], function () {
  ...