<p>The multilang filter syntax was changed in 1.8 and so the &lt;lang&gt; tag is not supported any more.</p>
<p>Example: &lt;span lang="en" class="multilang"&gt;Hello!&lt;/span&gt;&lt;span lang="es" class="multilang"&gt;Hola!&lt;/span&gt;</p>
<p>Do you want to upgrade the syntax in all existing texts now?</p>