It includes Erlang, Elixir, ExUnit, ExDoc, Logger, IEx, elixirc
It leaves Mix for a different PR.
Command to spot these words:
ag -s '(?<!(\`))(?<!(\.))(?<!(/))(?<!(:))(?<!(_))(erlang|elixir|eex|iex|ex_unit|ex_doc|logger|elixirc)(?!(:))(?!(\?))(?!(_))(?!(-))(?!(\.))(?!(\`))(?!(/))(?!(>))' \
--ignore "*.erl" --ignore "*.yrl" --ignore "*.src"