Translate portfolio elements with Polylang

Hello,

I’m translating my portfolio website in my native language as I’m moving back to my country.
Everything seems working fairly well besides for the fact that I cannot understand how to translate the portfolio pages.

It seems that Polylang cannot work with this plugin.

Does someone know how I can go around this issue?

Thank you so much for your help!

The page I need help with: [log in to see the link]