if lang is None:
        lang = "en"
    lang_path: Path = docs_path / lang
    # Enable line numbers during local development to make it easier to highlight
    args = ["mkdocs", "serve", "--dev-addr", "127.0.0.1:8008"]
    if dirty:
        args.append("--dirty")
    subprocess.run(
        args, env={**os.environ, "LINENUMS": "true"}, cwd=lang_path, check=True
    )