<p>Allows the modification of the list of supported code languages as defined in <code>XF\Data\CodeLanguage</code>. This allows you to modify the CodeMirror "mode" which is enabled when that language is selected in the code editor, whether it is "common" (so it appears at the top of the list) and which CodeMirror add-ons are enabled when that mode is selected.</p>

<p>Callback signature:</p>
<blockquote><code>&amp;$languages</code></blockquote>

<p>Arguments:</p>
<ol>
	<li><code>&amp;$languages</code> - Array of languages which can be modified.</li>
</ol>