I have visited DLParis on quite a few occasions now.
Firstly you have no problems with language at all, I have never come across any cast member who didnt speak English.
I have been in early summer once and the place was heaving, lines were far worse than anything I have encountered at WDW, AVOID!
The best time I have had is in November and December.
We last went just before Chistmas (mid December and mid week) The place was really quiet and really beautifully decorated.The weather was fine every day with only a light iacket requied.
Just about all of the rides you'd expect to find are there.
Pirates,Haunted Mansion and Big Thunder are excellent and better versions than those found at the Magic Kingdom.
Space Mountain is pretty awesome, the building is fantastic and the ride makes the other SMs look like small kiddie rides, beware though it is slightly rough these days and can shake you up.
Just about all shows are presented in both English and French. You will find if two cast members are on stage one will speak in English and one French but interact as if they are speaking the same language, you dont notice the difference.
Journey into Imagination is presented in English, English speakers have to sit in the first 15 or so rows with all the others further back where there are headphones with translators.
Time keeper is in French with headphones for the rest of us, the English version is not the Robin Williams version.
Food is very similar to every other Disney Park, not great but edible and expensive. The best meal we had was at the Golden Nugget Saloon which is a character lunch buffet, great fun.
The Character Breakfast at Hotel New York is worth a visit.
We stayed at the Sequioa Lodge for our first visit but found it a little stuffy and the food at the hotel was pre booked table sevice only, there was no where you could just turn up and grab a bite.
Ever since we have stayed at the 2 cheapest hotels the Hotel Cheyenne and Hotel Santa Fe. The rooms are OK, slightly better than those at the All Stars with self sevice food so you can just grab a bite and then go and collapse in you bed rather than making a huge fuss of meal time.
If you wish to "Dine Out" there is plenty of choice at Disney Village.
I also found the cheaper hotels much more fun for younger guests, my 3 year old was much more at home playing at both resorts with activities laid on.
By visiting during Autumn to Christmas you get a good deal on room rates, last time we had a 4 night for the price of 3 stay which if you time your travel right gives you 5 days to spend in the park.I'd advise anyone to go then, My daughter loved the Christmas "it's a small world"
I love the place, after our first visit I said to my wife "I cant belive we took so long to visit being so close" (3 hours by train 40 mins by air) I think like most people we were snobbish about the place thinking "it cant be as good as WDW" Well we were wrong. DLP is easily on a par with the Magic Kingdom, it's slightly smaller but some of theming is amazing and if you love Disney it's all there for you. Just go with an open mind.It's a great place to visit to fill the time between trips across the pond.