I possess the original game and wonder if the GoG version has any advantage besides being digital.

Currently it says there is only English. Are more languages planned to release?

Anvil of Dawn contains some nasty bugs that can potentially get the player stuck. Were any bugs fixed?

It's the latest version, 1.1, which has glitches. Thus far I've found a few & tried to find a work-a-round for the ones I've found;

1. Rolling Stones - If you run after them & "push", their trajectories change, sometimes for the better or for worse. Able to even abuse it to kill certain enemies.

2. Backlash ("return to sender"-throwing blade weapon) disappears; The only way to make it work as it is supposed to is to THROW it first by pressing T in the game screen once, THEN equipping it.

If you abuse the throwing, you see this: http://i43.tinypic.com/a2gqde.png (but you'll be able to continue to play the game after pressing C lol)

3. If the automap quill pen text reaches close to the right side of the screen, mouse cursor becomes laggy & makes it hard, even impossible to remove the said text. Also seems to do the same when the text is "too long".

As mentioned above, it has been patched to version 1.1. I believe it's was only available in English. Odd thing, I never knew there was 1.1 patch. Back in those days the internet had not fully reached maturity, so patches were hard to find and took almost forever to download @ 14.4 kbps.