I'm using version 14 installed on BGT, and I have BG2 banters in BG1 part. Only one so far, Viconia starts with "What brought you to life?"
I've searched to the issue and this old thread
http://www.shsforums.net/topic/37191-banters-in-bg1/ suggests that it has something to do with Banter pack, so I'm posting it here.
Weidu.log:
http://pastebin.com/69QgNxRY