Is it possible to add a category for the marking that is not recommended?

In T421505#11759785, @Tacsipacsi wrote:

This is not the recommended markup. The recommended markup would be:

<translate>
== Foo == <!--T:1-->

<!--T:2-->
bar

== Baz == <!--T:3-->
</translate>

And with the recommended markup, section editing starts working (mostly – it does include an empty line between the <translate> and == Foo == <!--T:1-->, but that causes at most some extra white space on the page, no saving error).