Factual error: Druig leads several warriors outside Tenochtitlan as it was sacked by the Spanish conquistadores, and they live peacefully in the nearby forest, for 500 years. The forest is of course the virgin Amazon forest, as captions say. Small problem; Tenochtitlan was in Central Mexico.
Factual error: In the scene with Sersi creating water for the crops in Babylonia, it shows corn growing. Corn was only grown in the Americas, originating in Mesoamerica. They should have shown barley, wheat, or something else growing. (00:27:45)
Factual error: There is a billboard in London advertising a display of "artifacts" at the Natural History Museum. British English spells it "artefacts" and the Natural History Museum in London only holds exhibits on natural history. A display of artefacts would be at the British Museum, a completely different institution in a different part of London. (00:07:25)
Factual error: The scenes set in Babylon in 575 BCE have the characters speaking Standardized Arabic to one another. At the time in Babylon, however, Aramaic language was actually spoken - Arabic as a language isn't considered by historians to have emerged until the 1st century CE. There's still Aramaic spoken in some regions of Iraq and Turkey, so it's not like the filmmakers have to use Arabic instead.
Factual error: The police car that shows up after the fight with the Deviant in London has a siren that sounds nothing like a British police siren. More like a Continental European one.
Factual error: It can be argued that the MCU is not quite our world, but certainly mirrors it closely - after all, the movie makes a point to feature real life dates and events such as Hiroshima, showing that even Cap America's actions in Europe didn't alter the outcome of WW2. It's then quite puzzling to see then Sersi gifting the savages in Mesopotamia a golden dagger that reproduces with precision one of the golden daggers in the tombs from Ur; they were Mesopotamian artefacts, sure, but from around 2600 BC and the scene takes place in 5000 BC.
Suggested correction: It never says that the people who live with Druig in the Amazon in the present day are descendants of the people from Tenochtitlan. Nor does it ever say that the forest outside Tenochtitlan is the Amazon. He's probably been moving around for the last five centuries just as the other Eternals have.
Necrothesp
Never ever? He literally says "Do you remember this forest? Beautiful. It's the last place we all lived together. I've protected these people for 20 generations." They split after their argument during the sack of the town. If their base of operations exterminating the mutant space dogs in Mexico was in the Amazon forest, their logistic could use some work.
Sammo ★
Just because the last time they fought together was in Tenochtitlan doesn't mean that was the last time they lived together. They may have spent some time living peacefully in the Amazon before moving north to do their business in Tenochtitlan. And just because he's protected the people for twenty generations doesn't mean they're descendants of the people from Tenochtitlan. He may have found them later. We don't know every detail of the Eternals' history. You're just making assumptions.
Necrothesp
You are assuming the presence of a third party stranded for 500 years that the movie never showed before, different from the people that he led out of the city and that we have then to postulate he let go, in a location far off from the one of their last encounter. It's an assumption on entirely new details that you had to make up. My only assumption is to think that what is shown in the movie had purpose and fits, and someone just borked a caption.
Sammo ★
Who says they're stranded? He just said he had protected them for twenty generations. They'd probably always lived there. You're making the assumption that they must be the same people because nobody said they weren't. But nobody said they were either. Nobody in the film ever made a connection between the people in Tenochtitlan and the people in the Amazon. No mistake has therefore been made in either the dialogue or the captions.
Necrothesp
I noticed the same problem, the scene indicates the location as "Amazon" (it could be any of the Spanish speaking countries that have part of this forest), but then, Druig comes with the affirmation you pointed. It's obviously a geographical inaccuracy.
They don't speak Spanish in the Amazons.