I recently started a game of Pirates! When I sat down to play today, the pirates were no longer the only ones spicing up their speech with arrs and ahoys. The merchants were doing it. The military were doing it. The nobles were doing it (awkwardly). The barmaids were doing it. Even the user interface was doing it.
I thought at first that it might have always been that way, and just escaped my notice, but that seemed unlikely. Next I thought I might have accidentally enabled a game option for it, but I didn't remember reconfiguring anything.
Then another possibility came to mind. It seemed like a long shot, but just in case, I looked up today's date. Sure enough, today is International Talk Like a Pirate day. This 20-year-old game apparently knows it, and switched every bit of its dialogue and writing into pirate speak to honour the occasion.
I love this.
At the very least, my steam copy on windows 10 worked just fine a week ago on my yearly playthrough.