Right now, the community is supported in English, so I hope you don't mind me replying like this.
All members of the Premium for Family plan must live in the same physical address, as stated on the T&Cs. If they can't validate the address where you set up the account, they're removed from the plan and won't be able to join again.
If they don't live with you, they can still get the Regular Premium subscription here.
All the best.
“Music acts like a magic key, to which the most tightly closed heart opens.” ― Maria Augusta von Trapp