BGEE Steam modding, dialog.tlk not found in chitin.key

Hi, I've been working on a campaign for two years now on the Baldur's gates enhanced edition. I figured that if I wanted to install in the slot of the tutorial, i had to install the mod in BGEE instead of BG2EE.

Alas, when I tried the Steam version in C:\Program Files\Steam\steamapps\common\Baldur's Gate Enhanced Edition, I got this error while trying to COPY_EXISTING dialog.tlk:

ERROR locating resource for 'COPY'
Resource [dialog.tlk] not found in KEY file:
[./chitin.key]
Stopping installation because of error.

I figure that the dialog.tlk is located somewhere else, like C:\Program Files\Steam\steamapps\common\Baldur's Gate Enhanced Edition\lang\en_US\, but even if I link the file with this coding:

COPY ~lang\en_US\dialog.tlk~ ~override~
APPEND_FILE ~FactionWar/dialog.txt~

It will still mention the same error.

Maybe it would be easier if I just buy the GOG version, but paying 30$ again for a game I already have, notwithstanding that many players will have the Steam version instead, I wonder how I should find the dialog.tlk file or code the right path in my Setup.tp2, if it's not located in the chitin.key.

Thanks for your time!