Gender in namespace names

I think that option didn't depend on us. We have the Portal namespace added by default (maybe I'm wrong). In fact, we haven't requested it, I think. Moreover, this is the list with all pages in Portal namespace (just 15). Actually, as you can see, we don't use it at all. But my request was to substitute the English text with the Galician.

On the other had, if we change the namespace name, would it affect to the rest of wikis (apart from Wikipedia and sister projects) if they decide to enable Portal namespace? I mean, would they have "Conversa_portal:" as discussion namespace instead of "Portal_talk:" (which would be a redirect)?