There is an issue with the plugin Perfmatters activated on your site. If I deactivate this plugin, the shortcodes are rendered properly. Can you please confirm shortcodes work on your end?
It's the option "Script Manager" on the page Settings > Perfmatters > Assets. Not sure how it affects the slider but on my local host, even if I deactivate WPML, I see the same results.
So I think the issue does not relate to WPML in this case. I suggest you can contact Perfmatters support to ask for more information.
I hope I was helpful. Don't hesitate to ask if you find any problem along the way, I'll gladly help you.