laravel_localization.php

Route::get('/js/lang.js', function () {
    $lang = config('app.locale');

    $files   = glob(resource_path('lang/' . $lang . '/*.php'));
    $strings = [];

    foreach ($files as $file) {
        $name           = basename($file, '.php');
        $strings[$name] = require $file;
    }

    header('Content-Type: text/javascript');
    echo('window.i18n = ' . json_encode($strings) . ';');
    exit();
})->name('assets.lang');