What's messing with my default input language?

Question

The Problem

Why is my input language set to NL (=Dutch) every time I open an application, despite the default input language setting?

Background

I have a Windows 7 system with an English (US) interface language. I do most of my typing in English, but occasionally I need to type in Dutch.

For this reason, my language bar is configured to contain the following languages and keyboard layouts:

• English (United States)
  • United States International
  • United States International (Apple) <-- default input language
• Dutch (Netherlands)
  • United States International
  • United States International (Apple)

Since the computer is a laptop that I often use on a stand I often switch between two keyboards:

• The internal keyboard (US international layout)
• An aluminum Apple keyboard (US international layout)

For the Apple keyboard, I installed the BootCamp drivers and software (like so), which enable me to use the Apple-style multimedia keys (which are actually F-keys).

N.B.: The computer is NOT an Apple laptop. I'm just using Apple drivers for the Apple keyboard.

Answer 1

There is a key shortcut to change between languages. It is left [ALt]+[Shift].

You can deactivate or change this shortcut under Control Panel->Region and Language->Keyboards and Languages->Change Keyboard->Advanced Keyboardsettings.

This is a free translation from my German installation and might be different in original English Windows.