wrap inside django template blocktrans
<snippet>
<content><![CDATA[{% blocktrans %}$SELECTION$1{% endblocktrans %}]]></content>
<!-- Optional: Tab trigger to activate the snippet -->
<tabTrigger>trans</tabTrigger>
<!-- Optional: Scope the tab trigger will be active in -->
<scope>source.html</scope>
<!-- Optional: Description to show in the menu -->
<description>Trans snippet</description>
</snippet>