The Perseus crew are on their way to the treasure island, the birthplace of the Hundred Tales, where they hope to locate the treasure box left behind by the Soyuz crew.
So the people who stayed behind are the 
current inhabitants of the treasure island.
.الأشخاص الذين بقوا هم سكان جزيرة الكنز الحاليين
Das sind dann also die,
die heute auf der Schatzinsel leben.
Ce sont les descendants
de ceux qui sont restés.
I discendenti delle persone rimaste 
sono gli attuali abitanti dell'isola.
Então as pessoas que ficaram para trás 
são os moradores atuais da ilha do tesouro.
Жителями острова являются
потомки оставшихся.