The bug is that Google Image search results are roughly the same irrespective of the user's locale. You can try these searches...
Search for faces
I haven't yet been to Nigeria, but it's likely folks look different in Nigeria than in the US.
Search for hamburger
Search for hamburger
I haven't yet been to India, but it's likely that because cows are sacred the search results for hamburger should be different. Perhaps, the images should be of veggie-burgers.
Search for House
Search for House
I haven't yet been to South Africa, but it's likely that because of economics and climate differences houses in South Africa look different from typical houses in the US.
Google Web search is localized by language, and Google News search provides a large selection of localized Google News pages.
Not localizing Google image searches is a large bug.