My user page knows to show other languages in which my name appears.
But my watchlist does not know to show other languages in which I have a name.
Consequently, if I'm viewing http://en.wikipedia.org/wiki/Special:Watchlist
I cannot click through to another language in a single page. I have to first select my user page, then select a translation, then reselect the watchlist in that other language.
I suspect the same issue comes up for other special pages, though I didn't do an exhaustive investigation.
(Frankly, I wish I had a way to see a multi-language overview of all changes. I'm the same person in all cases. I don't really want to read these things as separate forums, but as one unified forum. But I can appreciate that it's hard to keep the universes separated, so I understand the present design. Still, if it can do it for the user page, I think it should do it for other pages.)
(If it helps to have a specific test case, I'm user Netsettler on en.wikipedia.org, es.wikipedia.org, and pt.wikipedia.org.)