Back in the old times we used to create redirects for `Wikipédia: `pages in huwiki like `[[hu:WP:AZ]]`. They were technically in main namespace. The talk page was `[[hu:Vita:WP:AZ]]`. Later on at some point `WP:` became an alias for `Wikipédia:`, so the according talk page is `[[hu:Wikipédia-vita:AZ]]`. The original talk page was neither redirected nor aliased, and it is now stuck somewhere. But Pywikibot still gets it through API and cannot do anything with it.
**Steps to replicate the issue** (include links if applicable):
* Click [[hu:Vita:WP:AZ]] or search for it in huwiki. It classifies an invalid page title.
* For me `watchlist = [page for page in site.watched_pages() if not page.isTalkPage()]` with Pywikibot raises `pywikibot.exceptions.InvalidTitleError: The (non-)talk page of 'Vita:WP:AZ' is a valid title in another namespace.` It is hard to reproduce if you don't have such page on your own watchlist.
*
**What happens?**:
The non-existing [[hu:Vita:WP:AZ]] is stuck on my watchlist. It does not appear on web interface either by formatted or raw editing of my watchlist, but somewhere it is there, and I think it is retrieved via API interface because Pywikibot complains.
**What should have happened instead?**:
Either it should be aliased for `Wikipédia-vita:` namespace or centrally removed from everybody's watchlist by sysops.
**Software version** (skip for WMF-hosted wikis like Wikipedia):
Current w:hu
**Other information** (browser name/version, screenshots, etc.):
See also T33078 for Pywikibot.