New type of categorie, or Tag ? in Forum?

Good morning,

I would like to suggest a new feature into the forum,

would it be easily to implement a feature like a “tag” in the name of the topic, or, near the categorie, with a view to order topics by the “main laguage” the user used in his message ?

What do you think about it ?

There is a tagger plugin for Discourse, but it looks like the Discourse people are going to fork it and possibly make an official version. I don’t know if I can easily turn it on until they do that, since we’re running the hosted one. But that would be cool.