This map was the result of a series of continent-wide anthropological studies of the nomadic and tribal cultures of North America in the 3100s by the University of Tharsis. Although it found substantial linguistic divergence across the subcontinent, in all, the findings added support to the still-controversial 'proto-Atlantean' hypothesis, which connects hundreds of languages worldwide to a single origin language thought to have originated either in the Caribbean or in western Europe.
It also marked an important step in reconstructing the proto-Amero-English language, accepted to be the common ancestor of many North American languages as well as some British. Across the continent, although the primary word used to describe a certain concept differed, cognates with somewhat shifted meanings were extremely common, hinting at a common ancestor. For example, the word 'siti', meaning 'large settlement' in many northeastern languages, has a cognate in 'chusa' in the Cascadian region, where it means 'realm' or 'kingdom.'
Some outlier languages, particularly in the Great Plains and the Appalachians, continue to stump researchers looking for links to their neighbors. Some leading scholars see these languages as the last survivors of a pre-proto-Atlantean substrate, and have begun to try to reconstruct these languages through studies of placenames.
A post-apocalyptic etymology map - I was inspired by /u/ladyegg's
recent reddit post and just had to try making my own. Credit also to the University of Amsterdam-Leiden for their very cool maps, which this template was based on. Obviously this doesn't make much sense in English; assume that the non-italicized words are in the OOC language.
I unfortunately have no linguistic training and am not sure whether the sound & semantic shifts I chose are reasonable. If anyone knows more about this subject I would love to hear about it, now that I have this template I am thinking about making some more in this series and would be interested to hear about ways to make this more plausible for other words! Possibly on the drawing board - 'king' and 'money'.