Even as someone who lived a long time in the US, I've failed a bunch of these on unclear definitions.
When you say "stoplights", is that just the lights themselves, or also the poles that support them? Is a tile that contains 1/3 of a bike wheel "bicycle" or "not bicycle"? Is a coach also considered a bus?
Other common issues - crosswalks and fire hydrants are common questions too, and crosswalks are not called that in most of the world and fire hydrants look pretty different depending on country.
This is perhaps a declining problem, as young people in so many countries are growing up as proficient US English speakers due to heavy social media consumption, to the point that US English CAPTCHA challenges would just feel normal. I suspect there are more young people around their world now for whom "crosswalk" is more natural than "zebra" -- in my country, the latter is already a shibboleth that one is an oldie who learned UK English, now regarded here as an antiquated standard after teaching switched to US English.
Also a declining problem because any recent LLM can solve them all for you. FWIW though I don’t know anyone in the UK who uses the term crosswalk, though I think most would probably understand it in context.
Maybe it's translated, but it's definitely not localised. Captchas are nonsense in the UK, and a lot of Europe browses in English even if not their first language.
Strange example. It is clear which ones are taxi's: The ones with liveries on the side that are all the same color. That is what it is like in most countries.
When you say "stoplights", is that just the lights themselves, or also the poles that support them? Is a tile that contains 1/3 of a bike wheel "bicycle" or "not bicycle"? Is a coach also considered a bus?