Hello,
1 and 5
You can translate all theme and plugin texts via PO file in WordPress. Here is a video tutorial that should help you translate your website texts with a Loco Translate plugin https://www.youtube.com/watch?v=D3NsDdMzsls&list=PLMw6W4rAaOgKKv0oexGHzpWBg1imvrval&index=3
2 Woocommerce does not provide the option for the automatic update and our theme does not influence that.
3. Unfortunately, there is no option.
4. The header does not have option to show the compare page, you can get there from the product grid.
Best Regards