Thanks so much for all the advice and responses! From pictures I've seen online, the Magic Kingdom-style park appears to be one of the most beautiful parks that Disney's ever built. I really hope we get the chance to take the trip sooner rather than later. I'm sure this will only help my cause hahaha.
While we're on the subject of languages, I'm just curious, is it the same in Tokyo? Are there DisneySpeak like things there as well?
Thanks for the help!
Just to add to the responses...
I took a three-day trip to DLP last July. Speaking only English was really not a significant problem at all. The CMs all speak French and English. Granted, the English for some of them was not exactly top-notch, but at most that resulted in a few extra seconds of trying to communicate.
Attractions all work in English as well, although there are different ways of making it happen. For example...
Some shows (e.g., Cinemagique, Animaque, Armageddon, LMA in the Studios) feature dialogue in English and French, with sufficient action, repitition, or translation that you can follow.
Many attractions have virtually no narration or dialogue (dark rides, Storybookland, Space Mountain, BTM). Others that have minimal dialgoue have some lines are in English and some in French (e.g., PoTC, Phantom Manor).
Pre-shows that include exposition or explanation are either in French with English subtitles on screen, or in English with French sub-titles (Captain EO, Armageddon, Rock n Roller Coaster) or have characters going back and forth between English and French (Star Tours, Buzz Lightyear). The parade characters did both English and French as well.
Menus at restaurants are in English and French.
The only attraction that really lost anything substantive for me was Star Tours, as I couldn't understand Rex. But that's really it. In short, you'll do just fine.
I posted a rather detailed trip report if you want to read more, include some additional language barrier thoughts. It's here...
http://forums.wdwmagic.com/showthread.php?t=608396