custom_lang_label prop or the data-custom-lang-label attribute if using HTML.$ echo "Hello World"{% set code_snippet %}
$ echo "Hello World"
{% endset %}
{% include '@bolt-components-code-snippet/code-snippet.twig' with {
  content: code_snippet,
  lang: 'bash',
  custom_lang_label: 'Terminal',
} only %}<div class="c-bolt-code-snippet" data-lang="bash" data-mode="light" data-custom-lang-label="Terminal">
<pre><code>$ echo "Hello World"</code></pre>
</div>