Programming language file extensions that match an ISO 3166-1 alpha-2 country code
Published on
2025-02-08
256 words
So there's this standard called ISO 3166-1 alpha-2 that defines a 2
letter code for every country on the planet (like ME = Montenegro) and
a bunch of places that aren't countries (like EU = European Union).
You've probably encountered such a code before in top level domain
names (.im belongs to the Isle of Man) and on Discord (typing
:flag_fm: yields a 🇫🇲 emoji).
One of these codes is RS (= Serbia). Either by a sheer coincidence or
someone playing 5D chess, .rs is also the file extension for the Rust
programming language, which is why the domain name of every other Rust
project now belongs to Serbia. This made me curious about other cases
like this, so here's an incomplete list of programming languages,
domain-specific languages, markup languages, etc which file extensions
match a country code. If you think something is missing, let me know!