I feel that it is my obligation to warn you that today is Talk Like A Pirate Day.
Actor Robert Newton, who specialized in portraying pirates, especially Long John Silver in the 1950 Disney film Treasure Island, the 1954 Australian film Long John Silver, and as the title character in the 1952 film Blackbeard, the Pirate, is described as the “patron saint” of Talk Like A Pirate Day. Newton was born in Dorset and educated in Cornwall, and it was his native West Country dialect, which he used in his portrayal of Long John Silver and Blackbeard, that some contend is the origin of the standard “pirate accent”.
The archetypal pirate grunt “Arrr!” (alternatively “Rrrr!” or “Yarrr!”) first appeared in fiction as early as 1934 in the film Treasure Island starring Lionel Barrymore, and was used by a character in the 1940 novel Adam Penfeather, Buccaneer by Jeffrey Farnol. However it was popularized and widely remembered with Robert Newton’s usage in the classic 1950 Disney film Treasure Island. It has been speculated that the rolling “rrr” has been associated with pirates because of the location of major ports in the West Country of England, drawing workers from the surrounding countryside. West Country speech in general, and Cornish speech in particular, may have been a major influence on a generalized British nautical speech. This can be seen in the Gilbert and Sullivan operetta The Pirates of Penzance, which is set in Cornwall; although the play did not (originally) use the phrase “arrr”, the pirates used words with a lot of rrr’s such as “Hurrah” and “pour the pirate sherry”.