public function filter($translations)
    {
        $cleanedTranslations = array();

        foreach ($translations as $pluginName => $pluginTranslations) {

            if (empty($this->baseTranslations[$pluginName])) {
                $this->filteredData[$pluginName] = $pluginTranslations;
                continue;
            }

            foreach ($pluginTranslations as $key => $translation) {
                if (isset($this->baseTranslations[$pluginName][$key])) {
                    $cleanedTranslations[$pluginName][$key] = $translation;
                }
            }

            if (!empty($cleanedTranslations[$pluginName])) {
                $diff = array_diff($translations[$pluginName], $cleanedTranslations[$pluginName]);
            } else {
                $diff = $translations[$pluginName];
            }
            if (!empty($diff)) {
                $this->filteredData[$pluginName] = $diff;
            }
        }

        return $cleanedTranslations;
    }