Plasma/FAQ is a redirect which always points to the latest version, so it's best not to use the link with the version number.
Sure. So, what to do if user is on 4.4 (4.3, 4.5 soon (hey, Plasma developers, where are you?), etc.) and wants to be instructed how to add a widget on his panel? ;)
On every Plasma/FAQ/whatever page there is an info box directing to the earlier versions :-)
Yes, really. 4.4 says For older versions you can turn to the KDE 4.3 specific page, theKDE 4.2 specific page, the KDE 4.1 specific page or the KDE 4.0 one
4.3 says For older versions you can turn to the KDE 4.2 specific page, KDE 4.1 specific page or the KDE 4.0 one
and so on. And they are all links.
The only page with these links is Plasma/FAQ. Aliasing of Plasma/FAQ with Plasma/FAQ/4.4 (4.3, 4.5, etc.) breaks all links on the translated versions (via Special:myLanguage). Subpages, like Plasma/FAQ/4.4/Configuration, have no aliases at all.
What is the solution for linking if we not use "/4.x/" in links? ;)
I'm not sure that I'm understanding the problem but while looking at it, I did note that the Plasma/FAQ/4.4 (which is what the user is actually reading) didn't have Special:myLanguage at all, so I've fixed that.
Plasma/FAQ itself only contains the redirect to the latest version, and the redirect has to be changed when a new version is made. Apart from that, all the links have /4.x in them. I would have thought that between that and the myLanguage thing it would work. If it doesn't, can you explain a bit more about what actually happens? Thanks