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Available from version 1.18.0 (r90742)
Allows changing the page content language and consequently all features depending on that (writing direction, LanguageConverter, ...).
Define function:
public static function onPageContentLanguage( Title $title, Language|string &$pageLang, $language ) { ... }
Attach hook:

In extension.json:

	"Hooks": {
		"PageContentLanguage": "MyExtensionHooks::onPageContentLanguage"

For MediaWiki ≤1.25:

$wgHooks['PageContentLanguage'][] = 'MyExtensionHooks::onPageContentLanguage';
Called from:File(s): ContentHandler.php

For more information about attaching hooks, see Manual:Hooks.
For examples of extensions using this hook, see Category:PageContentLanguage extensions.


  • $title: the Title object
  • &$pageLang: Language object or string; the page content language, either pass a Language object or a string (language code)
  • $language: Language or StubUserLang object; the user interface language

It was added in Title.php but is in content/ContentHandler.php since MediaWiki 1.21 .


For example, if you want to mark all pages in the namespace with index 200 (and its talk page 201) as being in French, use:

	static function onPageContentLanguage( $title, &$pageLang ) {
		if ( $title->getNamespace() === 200 || $title->getNamespace() === 201 ) {
			$pageLang = 'fr';
		return true;

See also[edit]