Hmm..this is a tough nut to crack. I have not been able to track it down.

I did manage to get the minimumbuilding minbuild tga and desc sorted by deleting the construction conditional (line 3603) - this for the sweboz starting settlement. Perhaps this will give you some clues.

I checked out Bin-kath (Bin-kanath?) and the 3 DS buildings display Nomad whilst the 4 campaign_script.txt-placed buildings display Western Greek. I shifted one of the latter over but it made no difference. A comparison as of yet also had drawn a blank.

I will try and get time to look into this further, but I cannot promise.