$specialPageAliases: associative array of magic words synonyms
$lang: laguage code (string)
+'LinkerLinkAttributes': At the end of Linker::getLinkAttributesInternal() just before the return
+&$this: Linker object
+$title: 'title' attribute string
+$class: 'class' attribute string
+&$result: Final attribute string
+
'LinkerMakeExternalImage': At the end of Linker::makeExternalImage() just before the return
&$url: the image url
&$alt: the image's alt text