internet top-level domain generally used or reserved for a country
The Mapmen explain the most popular Internet country code
Map Men: You'll never guess the most popular internet country code [11:13]
Are domain names with country codes good?
Eli5: Why do some nations use an Internet address suffix derived from their English name and others use the native nation name?
Most of the top level country domains, (such as .de or .tw) were (mostly) directly taken from earlier assigned two-letter country codes used in other international things, such as banking, and were defined and agreed upon international standards. Generally, these two letter codes were derived from the English names, but there are lots exceptions.
You can look at all the top level domains here and see its a pretty jumbled bag between english language names and not as there are plenty of english and plenty of ones that are in local languages or other changes. Only a few countries had "issues" with their codes, notably, the UK's assigned two-letter codes in previous international standards is generally gb, but for the country domain, they decided to use .uk
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