I apologize for the late reply,
Thank you for your complement on the Theme,
It’s fairly easy to setup multilingual websites with WordPress using WPML.
WPML is the plugin we are using to manage our multilingual demo
There is also another option that users have used, a free plugin called polylang
Please feel free to ask any questions regarding the installation of WPML if you choose to go with it.
Find out more about polylang at https://wordpress.org/plugins/polylang/faq/