1. Please send me specific urls and screenshots
2. Go to Theme Options -> Single Product Page -> Single Product Layout https://prnt.sc/q6y2yk
I recommend you enabled Single Product Builder feature https://prnt.sc/q6y3co
3. You can use this plugin to translate Theme / Plugins: https://hungpd.name/translating-your-theme-with-loco-translate-plugin/
4. Sorry for this. Could you please send me screenshots?
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.