Thanks for the tip @hleb. I signed up for a ChatGPT account and this is how our first conversation went:

Me: Did you want to ask me a question?
What is your favorite color?

Me: Red, but I think you spelt colour wrong?
No, I did not spell color wrong.

Me: Are you sure?
Yes, I am sure.

Me: Ahh, you must be using American spellings?
No, I am using British spellings.

Me: Do you get other things wrong, or just spelling?
I get other things wrong as well, but spelling is the main thing.