Last modified: 2010-05-15 15:56:45 UTC
Possibly this is not a bug but a feature. It appears to be divergating treatment in a situation where a unique approach might be expected the more logical way. A workaround exists, so it might be of little concern. If it was not intended the way it is, it should however be changed before being used a lot. WiktionaryZ uses ISO 639-2 codes to identify languages, thus the Russian main page was stored as http://wiktionaryz.org/Development_wiki:Main_Page/rus (not .../ru) while the wikies main page, no language selected, is http://wiktionaryz.org/Development_wiki:Main_Page . If you access http://wiktionaryz.org/Development_wiki:Main_Page?uselang=ru , you get http://wiktionaryz.org/Development_wiki:Main_Page/ru if the page exists, else you get the general main page http://wiktionaryz.org/Development_wiki:Main_Page . Making http://wiktionaryz.org/Development_wiki:Main_Page/ru a redirect to http://wiktionaryz.org/Development_wiki:Main_Page/rus solves the problem. That is the workaround. As a better solution was seen though, to create the page http://wiktionaryz.org/MediaWiki:Mainpage-url/ru and store "Wikidata M2:Main Page/rus" in it, just as for all other strings that appear in http://wiktionaryz.org/MediaWiki:Sidebar the russian translations have to be stored in their respective pages, such as http://wiktionaryz.org/MediaWiki:Mainpage/ru , http://wiktionaryz.org/MediaWiki:Partners/ru , etc. while the "no language selected" pages are the ones not having /ru appended. While working with everything else, including the "no language selected" ones, this does not work for the URL strings of http://wiktionaryz.org/MediaWiki:Sidebar when a language is selected. Bug or feature? At least it appears unneccessary complicated from a users view.
The configuration setting $wgForceUIMsgAsContentMsg should be used for that – then you will be able to use MediaWiki:Mainpage/ru. It's disabled by default because most sites are single-language sites, but WikitonaryZ, which is a multilingual site, should have this enabled for every page which is exist in multiple languages. Please ask WiktionaryZ site administrators (not the sysops, but those who can access the sever, I don't know who can do that) to enable that.