Language settings for BG1

[Darth Malignus]

I've run into a bit of a snag. I installed BG 1, and it runs fine. I then install Tales of the Sword Coast, and I'm then told it can only be run on English language operating systems. They're both from the same 4 DVD-box set, and from that box BG2 runs fine along with Throne of Bhaal. The thing is, I'm running Windows 7, but I had no problems like this in XP.

Anyone have any ideas what could be done to fix something like this? My language is set to Danish, but that never caused anything like this before.

Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7600)
System Manufacturer: Acer
System Model: Aspire M3203
Memory: 8192MB RAM
Processor: AMD Athlon(tm) II X2 240 Processor (2 CPUs), ~2.8GHz
DirectX Version: DirectX 11
Speakers: Realtek High Definition Audio
Card name: NVIDIA GeForce GT 220