> if they completely changed the name, like a when Swaziland switched to eswatini.
It's "Eswatini" with a capital letter and no, it's not a complete change. In both cases the word means the place of the Swazi/Swati people. If you're not aware that Southern African languages use prefixes such as "e-" as well as suffixes (like e.g. the suffix "-land" in English) then I guess it's harder to recognise the word stem. But they are related terms, not a "complete change".
It's "Eswatini" with a capital letter and no, it's not a complete change. In both cases the word means the place of the Swazi/Swati people. If you're not aware that Southern African languages use prefixes such as "e-" as well as suffixes (like e.g. the suffix "-land" in English) then I guess it's harder to recognise the word stem. But they are related terms, not a "complete change".
1) https://en.wikipedia.org/wiki/Swazi_people