I have uploaded the translation files that we have https://recordit.co/35p1IaxAGS
It’s a partial translation. You can finish translation in Loco Translate > Themes > XStore > continue the transition of the XStore theme. Do the same for the core plugin (Loco Translate > Plugins > XStore Core). If you fully translate theme and plugin files we’ll be glad if you could share the translation with us.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.