Dragon Dictator
My dad was never good with a keyboard so I bought him Dragon Dictate, like half a lifetime ago. He got on fine with it, but it couldn't understand a word I said. Everyone says we speak identically, but Dragon Dictate disagreed.
More recently I bought him a Google Home for him to chat to. He wasn't impressed. He asked it, "Okay Google, who were the Famous Five?", and it correctly listed the five Hibs players from the 1950s (Smith, Johnstone, Reilly, Turnbull and Ormond). I asked it, "Okay Google, who were the Famous Five?", and it repeated the Enid Blyton stories.
I concluded it had picked up on his Leith accent, and thought mine a wee bit English.
[Or it just knew I was a bigger fan of Blyton than Hibs]