To install this theme you must have a working version of WordPress already installed. If you need help installing WordPress, follow the instructions here:download link
To use Halci, you must be running WordPress 4.8 or higher. We have tested it with Mac, Windows and Linux. It has been tested on Chrome, Firefox, Safari, Opera, Internet Explorer 10+
Dashboard > Plugins.
Then do as attached screenshots serially. Hope you will able to translate your website easily.