Being an African born & bred in Nigeria, I particularly find this appalling. Captcha usually asks users to identify fire hydrants, crosswalks & other objects with design patterns that are not common here, in everyday living. There's a big question on whether these approaches work well for onboarding the next billion users to the internet, especially since the demographics are much different from existing internet use…
My prediction: This will lead to new users being turned away from established products from the anglosphere and develop their own alternatives. Maybe after a while the big companies will notice and adapt, which might already be too late by then, or maybe they just buy the smaller ones directly, who knows.
Captchas will be localised long before that.