Well, the French, of course! This includes all classes, from servants to Royalty.
Rhythm and Music
This dialect has a very liquid feel to it. The resonance is located in the back of the mouth, and vowels that are near "m," "n," and "ng" become very nasal. It's almost like you are speaking through cough syrup.
Sound Changes
Each of the links below is a ".mp3" file demonstrating a sound change. Listen to the example as many times as you need to, repeating it on your own afterwards. Take as much time as you need to with each sound. If you take the examples in order, you will sometimes run into sounds you haven't gotten to yet. Don't worry about it, just do the best you can until you've gone through all the sounds. Then go back and listen to the examples again, and make whatever corrections you need to.
I have included notes where appropriate.
These first four changes are all closely related to the resonance. Make sure you have them down solidly before you go on!
This pair of changes is pretty subtle. It's a real test of whether or not you've got the hang of the resonance. The long "o" in words like "coat" and the "aw" sound in words like "caught" are changed very subtly by the resonance. Trust me, it makes more sense when you listen to it.
He was left alone on the boat in his coat. He ought not to be walking, leading with his jaw.
In English,we pronounce the "r" sound in the middle of the mouth. In French, it is all the way in the back, almost swallowed. This is the most distinctive sound in this dialect, and absolutely must be mastered. It can also be one of the most difficult to get the hang of, so practice, practice, practice!
His racing heart beat hard against his breast.
We now come to a series of changes that can easily be taken too far. The more comedic your character, the farther you'll want to take them. Fist of all, the "ch" sound in words like "change" becomes an "sh" sound.
Chickens and children should not chase one another.
The soft "g" sound in words like "budge" and "jaw" moves towards a "zh" sound. Be careful with this one, it is easy to lose intelligibility.
The judges enjoyed the fudge company's jingle.
The soft "th" in words like "thin" becomes an "s." The hard "th" in words like "the" becomes "z." Again, this one can quickly become too strong, so you may want to merely 'clip' the sounds.
They played around with this, that, and the other thing.