I got stuck on same place, and stoped playing untill final translation comes out. I`m sure there is some quest that unlock new island.
http://forum.1cpublishing.eu/showthread.php?t=23322
they say there are at least 12 more quests, so some of them must give us acess to new island. I decided to play when full translated mod comes out, since i have no idea what am i suposed to do with 5 quests i got so far (white untranclated chat from some NPC-s).
As for what to do , @tori2ruke i sugest to w8 full english mod
