In nearly every piece of (Western) media that features pirates, they all have the same language patterns and are spoken with the same kind of accent. Is this based at all in reality? If so, was it pervasive among pirates at the time? If not, how did it become so commonplace in our media?
Here's an answer from a time before moderation, it looks like.
Here's an answer by /u/enclavedmicrostate about pirate accents in media before the current accent was "settled on"