Wikimedia Bugzilla is closed!

LanguageEt.php rev 1.23 does not allow monthnames, daynames and math preference
texts to be displayed (problem occurs on et.wikipedia.org, et.wiktionary.org).
The reason is that it contains several methods like the following:

     function getWeekdayName( $key )
     {
             global $wgWeekdayNamesEt;
             return $wgWeekdayNamesEt[$key-1];
     }

Variables like $wgWeekdayNamesEt are not available any more, instead the
messages previously stored there, are now stored in $wgAllMessagesEt. Therefore
such methods should be removed.

I was the one who caused the problem by forgetting to remove the methods when
submitting a previous patch. I will post a new patch candidate in any minute.