Language projects with a community Code of Conduct:
Python, Rust, Golang, Ruby, Perl5, Erlang, Elixir, Zig, ISO C++ (WG21 https://isocpp.org/std/standing-documents/sd-4-wg21-practice...), ISO C (WG14) https://lists.isocpp.org/liaison/2021/04/0444.php), ECMA/JavaScript (https://tc39.es/code-of-conduct/)
Language projects without:
Java (Oracle's, anyway), Nim
Language projects with a community Code of Conduct:
Python, Rust, Golang, Ruby, Perl5, Erlang, Elixir, Zig, ISO C++ (WG21 https://isocpp.org/std/standing-documents/sd-4-wg21-practice...), ISO C (WG14) https://lists.isocpp.org/liaison/2021/04/0444.php), ECMA/JavaScript (https://tc39.es/code-of-conduct/)
Language projects without:
Java (Oracle's, anyway), Nim