You've always wanted to speak like the pirates of old times spoke, right? Sure, I knew that you did (just work with me here. ha).
Anyway, WarGameVault has a very-highly rated book by George Choundas, entitled
The Pirate Primer: Mastering the Language of Swashbuckers and Rogues. It's on sale as today's Deal of the Day (there are about 14 hours from now left on the deal) for only $6.00. Amazon's Kindle is outrageously

priced at $9.99!
According to
Amazon's book description, this book is "the only authoritative work on the pirate language."
Of course, we don't really, completely know how pirates spoke in their day. I mean there were no tape recorders, CD recorders, MP3 recorders, and such like in their days. I doubt that anyone thought of taking dictation of what pirates said, for the purpose of the reading enjoyment of people in 2017. Rather, "
The Pirate Primer contains three centuries of distinctive terms and usages uttered by (and attributed to) pirates in film, TV, literature, and history." (
Amazon).
There are nearly 500 pages of pirate-type talk in this tome!
This book, as sold by WarGameVault, is available in only the ePub format, it appears.
http://www.wargamevault.com/product/105945/.