Last modified: 2013-04-22 16:15:30 UTC
Examples: https://meta.wikimedia.org/wiki/Special:NoticeTemplate/view?template=FDCpropreview20132v2&wpUserLanguage=s causes a "Wikimedia Foundation Error" with the following message": "PHP fatal error in /usr/local/apache/common-local/php-1.21wmf12/includes/cache/MessageCache.php line 630: Call to undefined method languages::getCode()" https://en.wikipedia.org/w/index.php?uselang=s yields a page with the following text: [6855416c] 2013-03-30 01:00:28: Fatal exception of type MWException
Oh. Hmm. Should we prohibit one letter language codes?
FWIW, other one-letter codes (e.g https://en.wikipedia.org/w/index.php?uselang=t ) don't seem to provoke this error.
https://gerrit.wikimedia.org/r/57273