Hello,

1. Please Go to Theme Settings >> Shop and enable the option.

Screenshot: https://gyazo.com/908a76ffbb8c6ea1e9e9e52de25a1895

2. You can try using the Loco translate plugin for that.

3. Please read our ultimate guide in the following link:
https://xtemos.com/wordpress-performance-optimization-the-ultimate-guide-in-2021/

Best Regards