Windows 7 – Stop Powerpoint from changing proofing language to keyboard language

I use Powerpoint 2010 on Windows 7. My keyboard layout is German, but I write my presentations in English.

Now I created a presentation with Default Language set to English, and I want it to use English for proofing. When I create a new slide/textbox/… the language is indeed English. However as soon as I start typing, the language changes to German. This happens because my system-wide keyboard layout is set to German. If keyboard layout is changed to English, everything is alright.

Now I want to stop Powerpoint from changing its proofing language to match my keyboard language. I tried changing the LangTuneUp key  to Off or Prohibited in HKEY_CURRENT_USERSoftwareMicrosoftOffice14.0CommonLanguageResourcesas indicated here, but it didn’t help. Any other ideas?

P.S. Oh how I hate it when application-developers try to be clever.

Solution:

To disable Powerpoint from matching the system language (which fixes this very annoying behavior), go to Options->Language, then under Choose Display and Help Languages move “Match Microsoft Windows” and “Match Display Language” to the bottom of the list.