Yes, region settings can be customized.

It controls the admin language interface.

Yes, from the Plan settings section.

A temporarily inactive store due to billing or plan issues.

Tap the profile icon and select Log out.

Always log out after use.

Yes, outdated software may cause login problems.

Clear cache, try another browser, or use another device.

Yes, custom domains with /admin work.

Add /admin after the store URL.