We are a non-English native speaking couple (we speak Spanish)on the 20s and went on
DCL twice.
I read some people posted in this thread part of their 'nightmare' experience was to be seated with non-English speakers and I don't blame them. Actually, that was part of my worries at dinner time, I didn't wanted to be a pain for our tablemates!
In our second cruise (our honeymoon) we went to Lumiere's for our first dinner and my fear came true, we were assigned in a table of four and a couple were waiting for us (from Gainesville, FL). After introduction I appologized and talked with them about how unlucky they were to be sitted with a foreing couple. I couldn't be more wrong. We had so much in common and I can't imagine better companions for our cruise. The staff almost had to kick us out of the dinner rooms every night since we were the last ones to leave (it took us our time to taste all desserts)
For the whole week we share some time with them at the pool, the beach and OffBeat. And we missed them in our Palo's night.
We had our ugly experience in that cruise one morning at Breakfast, we went to Lumiere's and my wife and I sit in front of each other in a table of 8 since the DCL staff told us to sit there. Five minutes later a family of 4 was sit in the table with us and since I was talking with my wife this guy told his wife a rude comment about how they hated the way DCL managed their tables and next day they better be going to Topsiders so they don't have to share with strangers. I played the old I didn't hear you and finished my breakfast and leave, not without saying goodbye in proper English.
The truth is it really affect me. I couldn't imagine how this people was in a
DISNEY cruise!!. I guess after a couple of days of Disney I lower my defence a little too much.
Thank to our dinner mates we arrive at the conclusion that, yes, nasty people also goes in cruises (the odds are you can expect some in a 2000 people boat) but that doesn't have to affect your cruise experience. You can tell there's a lot of nice people from the conversations I had at the pool or the Captain's reception. For a lot of us getting to cruise is something we can't do as often us we like (well, that probably happens even to the people that goes lots of times

) and is not worthy to let someone ruin your experience.
DCL do try to put you with suitable people regarding age and family composition (that's why you start your rotation in Lumiere's if you don't have children) but that's for sure a hard task. Don't let this thread scare you (search the forum for 'tablemates friends' for a change) and if you end up with some people you can't stand, be polite and ask for a table change.
Sorry for the long post!
German