Those aren't the recognizers you're expecting. The link you have is for server recognizers, while the recognizers you already have installed are for desktop recognizers. (The differences between desktop recognizers and server recognizers are outlined here.)
The Desktop recognizers are installed as part of the Windows 7 Language Packs.
That being said, however, you cannot connect multiple recognizers to the same audio source and have the English recognizer send events for English speech and the French recognizer for French speech. Rather, the English recognizer will analyze the incoming (French) audio and attempt to process it as if it were English, usually resulting in a bunch of incorrect recognitions. The same is true for other languages.