Looked at the languages based on Travis CI https://docs.travis-ci.com/user/languages/
Everytime a new job starts, we check the language and play one note, according to the following mapping. Languages are loosely clustered with respect to different levels of the software stack.
| category | language | note | color |
|---|---|---|---|
| client | dart, elm, js, swift, objective-c | G4 | |
| app | c#, c++, smalltalk, java, haxe, scala | D4 | |
| script | groovy, perl, perl6, php, python, r | B3 | |
| backend | haskell, D, crystal, clojure, elixir, ruby | D2 | |
| system | android, c, go, nix, rust, bash | G1 | |
| swedish | erlang | E2 | |
| other |