Beswad:
Back in my student days, when many of my friends were travelling all over Europe (and occasionally beyond) I was scared by the thought of independent travel abroad because of the potential language problems.
These days (at the age of 57) I find that the challenge of going to a country where I don't speak the language is the best part of travelling. A few weeks back I took a day trip to Bratislava. You can't even buy a Slovak phrase book. (The best I could find was a phrase book which had a few pages for each of the East European languages). Yet I still managed to buy a day ticket for travel on the buses and trams, order plenty of beers (I can do that in ANY language!) and get well fed.
Please, please, please don't let the thought of language difficulties put you off foreign travel. You'll miss out on so much!
Anyway, although Disneyland Paris has never appealed to me, I'm sure that you'll have no problems using English there. (Although you need to be aware that English-speakers nearly always get served last in French restaurants. I write from a great deal of experience!).
If you're seeking an inclusive coach tour, please post again telling us which part of the UK you're based in, so that we can try to find something suitable. (However I also repeat my suggestion of checking out what Eurostar has to offer. You can book through tickets from any station in the UK on any of their inclusive deals).
Chris