First, there is the dialect feature known as a "Linking R" (which usually happens in dialects where people don't pronounce the "r" at the end of words by defau

First, there is the dialect feature known as a "Linking R" (which usually happens in dialects where people don't pronounce the "r" at the end of words by default). In this video, you can hear JFK saying "eleven billion dollah" then a few sentences later, he says "eleven billion dollars", because the word is follwed by an "i". So, his accent drops a lot of "r" sounds by default, but inserts them back in if the following word begins with a vowel. https://youtu.be/bOGWTEgta_w?t=52 https://youtu.be/bOGWTEgta_w?t=52 So there is a perfectly articulate, quite educated man, who is making "non-standard" usage that is quite correct in his own dialect. Another example is where people would typically say the word "car" as "cah", for example. "Pahk the cah." However, if the next word begins in a vowel sound, these same people will suddenly pronounce the "r" at the end of the word. The same person would say "pahk the car in the yahd", because the word after "car" begins in a vowel sound. There is also the "Intrusive R" where people add a "r" sound to words wholesale (instead of merely pronouncing an "r" that was already there, which they were dropping before). You often hear this if the following word also begins with a vowel. You can hear this when people say things like "idear" instead of "idea". Here's a British gent talking about this: https://www.youtube.com/watch?v=UpX8NZMxp9Q https://www.youtube.com/watch?v=UpX8NZMxp9Q This happens in certain parts of New England, Britain, and Australia. In the USA, while some in New England are laughing at Southerners for their exaggerated vowels, the Southerners are laughing at the New-Englanders for their crazy "r" sounds. Human dialect is fascinating.