private function makeDataFallbackToEnglish($textFile, &$mappings)
    {
        $englishPath = $this->getEnglishDataPath($textFile);

        if ($textFile == $englishPath || !file_exists($this->getFilePath($englishPath))) {
            return;
        }

        $countryCode = substr($textFile, 3, 2);

        if (!array_key_exists($countryCode, $this->englishMaps)) {
            $englishMap = $this->readMappingsFromFile($englishPath);

            $this->englishMaps[$countryCode] = $englishMap;
        }

        $this->compressAccordingToEnglishData($this->englishMaps[$countryCode], $mappings);
    }