Craft CMS table translation

TranslateController.php

<?php

namespace modules\sitemodule\console\controllers;

use Craft;
use craft\console\Controller;
use craft\elements\Entry;
use Google\Cloud\Translate\V2\TranslateClient;
use yii\console\ExitCode;

class TranslateController
{
    public function actionUsps()
    {
        $siteNL = Craft::$app->getSites()->getSiteByHandle('default');
        $siteDE = Craft::$app->getSites()->getSiteByHandle('proPartDE');

        $products = Entry::find()
            ->section('products')
            ->siteId($siteNL->id)
            ->status(null)
            ->all();

        $translate = new TranslateClient([
            'key' => ''
        ]);

        foreach ($products as $product) {
            $deProduct = Entry::find()
                ->section('products')
                ->siteId($siteDE->id)
                ->status(null)
                ->id($product->id)
                ->one();

            if ($deProduct) {
                $changed = false;

                if ($product->usps) {
                    $this->stdout("Processing $product->id...\n");

                    $deProduct->usps = array_map(function ($usp) use ($translate) {
                        $uspText = $usp['usp'];

                        $res = $translate->translate($uspText, [
                            'source' => 'nl',
                            'target' => 'de'
                        ]);
                        $uspText = $res['text'];

                        return [
                            'col1' => $uspText,
                            'usp' => $uspText
                        ];
                    }, $product->usps);

                    $this->stdout("  Translated USPs for $product->id\n");
                    $changed = true;
                }

                if ($changed) {
                    if (Craft::$app->elements->saveElement($deProduct)) {
                        $this->stdout("  Saved!\n");
                    }
                }
            }
        }

        $this->stdout("Done!\n");
        return 0;
    }
}