* Added action=validatepassword to validate passwords for the account creation
and password change forms.
* action=purge now requires a POST.
+* There is a new `languagevariants` siprop for action=query&meta=siteinfo,
+ which returns a list of languages with active LanguageConverter instances.
=== Action API internal changes in 1.29 ===
* New methods were added to ApiBase to handle errors and warnings using i18n