The summary of this page is essentially: For the kernel: C, C++ For the rest of the OS: C, C++, Dart, Rust For the "end-developers" (=regular app developers)

The summary of this page is essentially: For the kernel: C, C++ For the rest of the OS: C, C++, Dart, Rust For the "end-developers" (=regular app developers): C, C++, Dart