They're currently the dominant culture so it's not an awful assumption - people generally can accommodate and work around these issues. It's just, I dunno, a bit insensitive or frustrating?

Testing some more here https://www.google.com/recaptcha/api2/demo I also got "mark all fire hydrants". I've never seen one in real life, only those red in American cartoons. I got "parking meters", but none of them looked like they do in my country (and I've never heard anyone call them that word they used for translation). I got mark "mountains", but to quote Dundee: You call that a mountain?

Unfortunately, there are tons of people with less than half functional brain... well I'm slightly joking here, but the point is you can't assume your user's cognitive ability. The CAPTCHA as it designed should be obvious to any human that would use your website (including those with impaired cognition) while being hard to robots. The OP is claiming that Google CAPTCHA is an international service and yet can fail to be obvious to a significant portion of non-Americans that would use your website.

Here in the UK, taxis are normally just normal cars with vinyl stickers on the side. I think many people would associate the sign on the top with being a driving instructor's car

I'd like to see someone actually show an example of a captcha they were incapable of solving.

What if the writing accompanying the phone number says "Schlüsselservice Maier"? Some kind of ... shuttle service? Is that a taxi? (It's actually a locksmith.)

Of course these kinds of situations don't really happen for English speakers. I don't think I've ever seen non-English text in a CAPTCHA... Instead you get a picture of some Californian street with palm trees or something. (I assume those streets are in California. Maybe they're actually in Jakarta or elsewhere, in which case I'm sorry for being presumptive.)

The bottom left does not have roof visible. Nor does top left for that matter, which could theoretically be taxi van.

I fail these captchas often enough for them to be annoying, but I assumed they are simply buggy.

And if you get it wrong you simply move on to the next question.

Yes, and then on to the next. They don't just profile your answers, they profile your browser too. The more obscure the browser, the more likely my answers are "invalid", regardless of what I select.

I always close the tab, it's way better for my health.

Taxi comes in exactly same colors and types as any other car.

https://shkspr.mobi/blog/wp-content/uploads/2017/11/taxi-min...

A theoretical person that also wouldn't get shown another captcha as a follow-up. I constantly fail captchas on some technicalities (or haste), and have never managed to fail so many to be flagged as a bot and be denied to a website.

And given how many times I usually have to solve them, if not critical for some reason, I tend to just close the tab for whatever I was going to do or read, if a CAPTCHA shows up. I have very little patience for doing free work for big corporations. If it was a non-profit with public access to the data set, sure.

In your country maybe.

But come on. It’s easy to figure these things out. This is an invented problem.

I understand people being annoyed by US-centrism, but that is a different matter.