Most people speak with accents, and pirates are just people.
different pirates speak different laguages.
rude and disreaspectfuly with a accent.
In a german accent.
Brazilian.
they always have an italian accent
Because Sweetie Belle speak in a General American Accent.
If you wish to speak French with a French accent, the best way is to surround yourself with natural French speakers and you will soon pick up the accent.
Pirates came from all parts of Britain and elsewhere and could talk with any number of accents, but the cliched accent/dialect (avast me hearties) in movies is actually West Country, that is the dialect of Devon and Cornwall. This was an area of smuggling and the alleged luring of ships onto rocks, and the plunder of shipwrecks, for centuries.
This video shows you how to speak in an Australian accent. http://sites.google.com/site/lrnthaccnt/home/australian-accent
If the nun is British, she probably will have a British accent. If she's German, she'll probably have a German accent.
Some people speak the Romanian language with a Hungarian accent.
Of course! Everybody has an accent. Many members of my Quaker meeting in Swarthmoor, Cumbria, England, UK, have the accent of the Furness district. I have found that Quakers in Bristol, UK, speak with a Bristol accent, those in Dublin, Eire have a Dublin accent and those in Manchester, UK, have a Manchester accent. I expect Brooklyn Quakers have a Brooklyn, USA accent and Peoria Quakers have the accent of central Illinois, USA!