How to apply a free multilingual function to the portfolio section?

Hi guys

So I’m new to wordpress trying to figure things out. I don’t now how to program so thats why I’m using WordPress mainly using it’s demo version functions and installing plugins to get what I need.
So I’m using the shapely theme from colorlib and am quite happy. But I just can’t get the portfolio translatet to the 4 language options i want to give on my page. Whats the easiest free way to do that?

Here my page https://www.mundobabushka.com/

Any help very apreciated, try to explain in “for dummies” style