getEditorConfig.php

<?php

use QUI\Ckeditor\Plugins\Manager;

QUI::$Ajax->registerFunction(
    'package_quiqqer_ckeditor4_ajax_getEditorConfig',
    function () {
        $config = [];

        $PluginManager = new Manager();
        $PackageConfig = QUI::getPackage("quiqqer/ckeditor4")->getConfig();

        $config['plugins'] = $PluginManager->getActivePlugins();
        $config['pluginPath'] = $PluginManager->getPluginUrlPath();

        $config['disableNativeSpellChecker'] = $PackageConfig->get("general", "disablenativeSpellcheck");

        return $config;
    }
);