Laravel: find missing translations with Artisan Closure Command (cli).

console.php

<?php

// ADD THIS TO routes/console.php
Artisan::command('lang {key} {lang?}', function ($key, $lang = null) {
    config([
        'filesystems.disks.lang' => [
            'driver' => 'local',
            'root' => lang_path(),
        ],
    ]);

    $disk = \Illuminate\Support\Facades\Storage::disk('lang');

    $dirs = collect($disk->directories(null, true))->filter(function ($dir) {
        return !\Illuminate\Support\Str::contains($dir, '-');
    })->when($lang, function ($c) use ($lang) {
        return $c->filter(function ($dir) use ($lang) {
            return \Illuminate\Support\Str::endsWith($dir, $lang);
        });
    });

    $explodedKey = explode('.', $key);
    $file = null;
    $key = $explodedKey[0];

    if (count($explodedKey) > 1) {
        list($file, $key) = $explodedKey;
    }

    $response = collect([]);
    foreach ($dirs as $dir) {
        foreach ($disk->allFiles($dir) as $_file) {
            if ($file && !\Illuminate\Support\Str::contains($_file, $file)) {
                continue;
            }

            $content = (array)include lang_path($_file);

            $response->push([
                'file' => $_file,
                'status' => array_key_exists($key, $content) ? "<fg=green>{$content[$key]}</>" : '<bg=red;fg=yellow>MISSING</>',
            ]);
        }
    }
    $this->table(['file', 'status'], $response->sortBy('status')->flatten()->chunk(2)->toArray());

    return 1;
});

HOW TO:

php artisan FILE.KEY LANG

KEY is mandatory;
FILE & LANG is optional;

finding key without specifying file & lang: php artisan lang failed

finding key inside specific file & all lang: php artisan lang auth.failed

finding key inside specific lang only: php artisan lang failed en