This mod is in Polish

Northern Tales of the Sword Coast is a Polish mod for BG I. 
It has a lot of its own quests, items, areas, NPCs and more. 
DSotSC is nicely included quests from this mod have some continuation in the NtotSC part of the game.
Currently this mod is in Polish only, but the team is working on a English language version. 

More info: www.isle.px.pl or www.crpg.riklaunim.noi.pl