Hello,
1) Don’t understand what is not translated. Could you provide me the screenshot?
3) No, English page does not inherit sidebar position of the Italian version
4) Page content field was empty http://prntscr.com/gv6ovq Seems you did not duplicate it from Italian version to translate. Check now and just translate all the content.
5) English page does not inherit sidebar position of the Italian version
6) It’s default WooCommerce widget http://prntscr.com/gv6s0e and it always displays featured products in random order, for example http://prntscr.com/gv6w21 and http://prntscr.com/gv6wk2
7) Because you did not create multilingual text widget http://prntscr.com/gv6qhp and selected to show the text for all the languages
Regards