* $wgValidateAllHtml was removed and will be ignored.
* $wgScriptExtension was removed (deprecated and ignored since 1.25).
See 1.25 release notes for more information.
+* $wgUseAjax is now marked as deprecated, just like the deprecated AJAX
+ framework that it enables. Some extensions mistakenly used this to check
+ whether any AJAX functionality at all should be enabled, further making this
+ problematic to retain.
=== New features in 1.31 ===
* (T76554) User sub-pages named ….json are now protected in the same way that ….js
* (T186647) New language support: Kumyk [къумукъ] (kum).
* (T187750) New language support: Spanish formal address (es-formal).
* (T187824) New language support: Hungarian formal address (hu-formal).
+* (T189127) New language support: Gorontalo (gor).
=== Breaking changes in 1.31 ===
* MessageBlobStore::insertMessageBlob() (deprecated in 1.27) was removed.