Translate English into Italian (some words)

I have a very difficult trouble with my page. I have installed WordPress version 5.4.4 with WooCommerce version 3.8.1, in Italian language. Also installed theme Astra version 2.0.1 and have plugins: CartFlow version 1.3.2, Elementor v2.8.2 & Elementor Pro v2.7.2, Official Facebook Pixel 2.2.0, Loco Translate v2.3.1 and some other stuff. Page which I built is in Italian language. Everything is OK except one thing.
I have just one product which I sell it. In CartFlow I created a form for shopping my product. Form is created like that the buyer must first insert data for shipping (name, surname, address, post…) then the second form is created that you can choose variation of product (color and size) and of course quantity. But here is the problem. This words (Product, Quantity, Price and Choose a variation) isn’t in Italian language but remain in English. I try numbers of plugins for translate (Loco translate, TranslatePress – Multilingual, Weglot Translate, Polylang). Now I have plugin Loco translate. I translate these words in this plugin, but somehow I still have English language in my second form. I really don’t know how to change that any more. If anyone can give me some advice what can I do I would be really grateful. If you need I can give you a link to page. Thanks a lot.

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