pixelfed/app/Util/Localization/Localization.php

<?php

namespace App\Util\Localization;

use Cache;
use Illuminate\Support\Arr;

class Localization {

	public static function languages()
	{
		return Cache::remember('core:localization:languages', now()->addDays(1), function() {
			$dir = resource_path('lang');
			return Arr::flatten(array_diff(scandir($dir), array('..', '.', 'vendor')));
		});
	}

}