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diff --git a/www/wiki/extensions/Translate/TranslateHooks.php b/www/wiki/extensions/Translate/TranslateHooks.php
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+++ b/www/wiki/extensions/Translate/TranslateHooks.php
@@ -0,0 +1,846 @@
+<?php
+/**
+ * Contains class with basic non-feature specific hooks.
+ *
+ * @file
+ * @author Niklas Laxström
+ * @license GPL-2.0-or-later
+ */
+
+/**
+ * Some hooks for Translate extension.
+ */
+class TranslateHooks {
+	/**
+	 * Any user of this list should make sure that the tables
+	 * actually exist, since they may be optional
+	 *
+	 * @var array
+	 */
+	private static $userMergeTables = [
+		'translate_stash' => 'ts_user',
+		'translate_reviews' => 'trr_user',
+	];
+
+	/**
+	 * Hook: ResourceLoaderTestModules
+	 * @param array &$modules
+	 */
+	public static function onResourceLoaderTestModules( array &$modules ) {
+		$modules['qunit']['ext.translate.parsers.test'] = [
+			'scripts' => [ 'tests/qunit/ext.translate.parsers.test.js' ],
+			'dependencies' => [ 'ext.translate.parsers' ],
+			'localBasePath' => __DIR__,
+			'remoteExtPath' => 'Translate',
+		];
+
+		$modules['qunit']['ext.translate.special.pagemigration.test'] = [
+			'scripts' => [ 'tests/qunit/ext.translate.special.pagemigration.test.js' ],
+			'dependencies' => [ 'ext.translate.special.pagemigration' ],
+			'localBasePath' => __DIR__,
+			'remoteExtPath' => 'Translate',
+		];
+	}
+
+	/**
+	 * Initialises the extension.
+	 * Does late-initialization that is not possible at file level,
+	 * because it depends on user configuration.
+	 */
+	public static function setupTranslate() {
+		global $wgPageTranslationNamespace;
+		if ( isset( $wgPageTranslationNamespace ) &&
+		$wgPageTranslationNamespace !== NS_TRANSLATIONS ) {
+			throw new MWException(
+				'$wgPageTranslationNamespace is no longer supported. Instead, define ' .
+				'NS_TRANSLATIONS and NS_TRANSLATIONS_TALK in LocalSettings.php before loading ' .
+				'Translate.'
+			);
+		}
+
+		global $wgTranslatePHPlot, $wgAutoloadClasses, $wgHooks;
+
+		if ( $wgTranslatePHPlot ) {
+			$wgAutoloadClasses['PHPlot'] = $wgTranslatePHPlot;
+		}
+
+		// Page translation setup check and init if enabled.
+		global $wgEnablePageTranslation;
+		if ( $wgEnablePageTranslation ) {
+			// Special page and the right to use it
+			global $wgSpecialPages, $wgAvailableRights;
+			$wgSpecialPages['PageTranslation'] = 'SpecialPageTranslation';
+			$wgSpecialPages['PageTranslationDeletePage'] = 'SpecialPageTranslationDeletePage';
+
+			// right-pagetranslation action-pagetranslation
+			$wgAvailableRights[] = 'pagetranslation';
+
+			$wgSpecialPages['PageMigration'] = 'SpecialPageMigration';
+			$wgSpecialPages['PagePreparation'] = 'SpecialPagePreparation';
+
+			global $wgActionFilteredLogs, $wgLogActionsHandlers, $wgLogTypes;
+
+			// log-description-pagetranslation log-name-pagetranslation logentry-pagetranslation-mark
+			// logentry-pagetranslation-unmark logentry-pagetranslation-moveok
+			// logentry-pagetranslation-movenok logentry-pagetranslation-deletefok
+			// logentry-pagetranslation-deletefnok logentry-pagetranslation-deletelok
+			// logentry-pagetranslation-deletelnok logentry-pagetranslation-encourage
+			// logentry-pagetranslation-discourage logentry-pagetranslation-prioritylanguages
+			// logentry-pagetranslation-associate logentry-pagetranslation-dissociate
+			$wgLogTypes[] = 'pagetranslation';
+			$wgLogActionsHandlers['pagetranslation/mark'] = 'PageTranslationLogFormatter';
+			$wgLogActionsHandlers['pagetranslation/unmark'] = 'PageTranslationLogFormatter';
+			$wgLogActionsHandlers['pagetranslation/moveok'] = 'PageTranslationLogFormatter';
+			$wgLogActionsHandlers['pagetranslation/movenok'] = 'PageTranslationLogFormatter';
+			$wgLogActionsHandlers['pagetranslation/deletelok'] = 'PageTranslationLogFormatter';
+			$wgLogActionsHandlers['pagetranslation/deletefok'] = 'PageTranslationLogFormatter';
+			$wgLogActionsHandlers['pagetranslation/deletelnok'] = 'PageTranslationLogFormatter';
+			$wgLogActionsHandlers['pagetranslation/deletefnok'] = 'PageTranslationLogFormatter';
+			$wgLogActionsHandlers['pagetranslation/encourage'] = 'PageTranslationLogFormatter';
+			$wgLogActionsHandlers['pagetranslation/discourage'] = 'PageTranslationLogFormatter';
+			$wgLogActionsHandlers['pagetranslation/prioritylanguages'] =
+				'PageTranslationLogFormatter';
+			$wgLogActionsHandlers['pagetranslation/associate'] = 'PageTranslationLogFormatter';
+			$wgLogActionsHandlers['pagetranslation/dissociate'] = 'PageTranslationLogFormatter';
+			$wgActionFilteredLogs['pagetranslation'] = [
+				'mark' => [ 'mark' ],
+				'unmark' => [ 'unmark' ],
+				'move' => [ 'moveok', 'movenok' ],
+				'delete' => [ 'deletefok', 'deletefnok', 'deletelok', 'deletelnok' ],
+				'encourage' => [ 'encourage' ],
+				'discourage' => [ 'discourage' ],
+				'prioritylanguages' => [ 'prioritylanguages' ],
+				'aggregategroups' => [ 'associate', 'dissociate' ],
+			];
+
+			global $wgJobClasses;
+			$wgJobClasses['TranslateRenderJob'] = 'TranslateRenderJob';
+			$wgJobClasses['RenderJob'] = 'TranslateRenderJob';
+			$wgJobClasses['TranslatablePageMoveJob'] = 'TranslatablePageMoveJob';
+			$wgJobClasses['TranslateMoveJob'] = 'TranslateMoveJob';
+			$wgJobClasses['MoveJob'] = 'TranslateMoveJob';
+			$wgJobClasses['TranslateDeleteJob'] = 'TranslateDeleteJob';
+			$wgJobClasses['DeleteJob'] = 'TranslateDeleteJob';
+			$wgJobClasses['TranslationsUpdateJob'] = 'TranslationsUpdateJob';
+
+			// Namespaces
+			global $wgNamespacesWithSubpages, $wgNamespaceProtection;
+			global $wgTranslateMessageNamespaces;
+
+			$wgNamespacesWithSubpages[NS_TRANSLATIONS] = true;
+			$wgNamespacesWithSubpages[NS_TRANSLATIONS_TALK] = true;
+
+			// Standard protection and register it for filtering
+			$wgNamespaceProtection[NS_TRANSLATIONS] = [ 'translate' ];
+			$wgTranslateMessageNamespaces[] = NS_TRANSLATIONS;
+
+			/// Page translation hooks
+
+			/// @todo Register our css, is there a better place for this?
+			$wgHooks['OutputPageBeforeHTML'][] = 'PageTranslationHooks::injectCss';
+
+			// Check syntax for \<translate>
+			$wgHooks['PageContentSave'][] = 'PageTranslationHooks::tpSyntaxCheck';
+			$wgHooks['EditFilterMergedContent'][] =
+				'PageTranslationHooks::tpSyntaxCheckForEditContent';
+
+			// Add transtag to page props for discovery
+			$wgHooks['PageContentSaveComplete'][] = 'PageTranslationHooks::addTranstag';
+			$wgHooks['RevisionInsertComplete'][] =
+				'PageTranslationHooks::updateTranstagOnNullRevisions';
+
+			// Register different ways to show language links
+			$wgHooks['ParserFirstCallInit'][] = 'TranslateHooks::setupParserHooks';
+			$wgHooks['LanguageLinks'][] = 'PageTranslationHooks::addLanguageLinks';
+			$wgHooks['SkinTemplateGetLanguageLink'][] = 'PageTranslationHooks::formatLanguageLink';
+
+			// Strip \<translate> tags etc. from source pages when rendering
+			$wgHooks['ParserBeforeStrip'][] = 'PageTranslationHooks::renderTagPage';
+			$wgHooks['ParserOutputPostCacheTransform'][] =
+				'PageTranslationHooks::onParserOutputPostCacheTransform';
+
+			// Set the page content language
+			$wgHooks['PageContentLanguage'][] = 'PageTranslationHooks::onPageContentLanguage';
+
+			// Prevent editing of certain pages in translations namespace
+			$wgHooks['getUserPermissionsErrorsExpensive'][] =
+				'PageTranslationHooks::onGetUserPermissionsErrorsExpensive';
+			// Prevent editing of translation pages directly
+			$wgHooks['getUserPermissionsErrorsExpensive'][] =
+				'PageTranslationHooks::preventDirectEditing';
+			// Prevent patroling of translation pages
+			$wgHooks['getUserPermissionsErrors'][] =
+				'PageTranslationHooks::preventPatrolling';
+
+			// Our custom header for translation pages
+			$wgHooks['ArticleViewHeader'][] = 'PageTranslationHooks::translatablePageHeader';
+
+			// Edit notice shown on translatable pages
+			$wgHooks['TitleGetEditNotices'][] = 'PageTranslationHooks::onTitleGetEditNotices';
+
+			// Custom move page that can move all the associated pages too
+			$wgHooks['SpecialPage_initList'][] = 'PageTranslationHooks::replaceMovePage';
+			// Locking during page moves
+			$wgHooks['getUserPermissionsErrorsExpensive'][] =
+				'PageTranslationHooks::lockedPagesCheck';
+			// Disable action=delete
+			$wgHooks['ArticleConfirmDelete'][] = 'PageTranslationHooks::disableDelete';
+
+			// Replace subpage logic behavior
+			$wgHooks['SkinSubPageSubtitle'][] = 'PageTranslationHooks::replaceSubtitle';
+
+			// Replaced edit tab with translation tab for translation pages
+			$wgHooks['SkinTemplateNavigation'][] = 'PageTranslationHooks::translateTab';
+
+			// Update translated page when translation unit is moved
+			$wgHooks['TitleMoveComplete'][] = 'PageTranslationHooks::onMoveTranslationUnits';
+
+			// Update translated page when translation unit is deleted
+			$wgHooks['ArticleDeleteComplete'][] = 'PageTranslationHooks::onDeleteTranslationUnit';
+		}
+
+		global $wgTranslateUseSandbox;
+		if ( $wgTranslateUseSandbox ) {
+			global $wgSpecialPages, $wgAvailableRights, $wgDefaultUserOptions;
+
+			$wgSpecialPages['ManageTranslatorSandbox'] = 'SpecialManageTranslatorSandbox';
+			$wgSpecialPages['TranslationStash'] = 'SpecialTranslationStash';
+			$wgDefaultUserOptions['translate-sandbox'] = '';
+			// right-translate-sandboxmanage action-translate-sandboxmanage
+			$wgAvailableRights[] = 'translate-sandboxmanage';
+
+			$wgHooks['GetPreferences'][] = 'TranslateSandbox::onGetPreferences';
+			$wgHooks['UserGetRights'][] = 'TranslateSandbox::enforcePermissions';
+			$wgHooks['ApiCheckCanExecute'][] = 'TranslateSandbox::onApiCheckCanExecute';
+			$wgHooks['UserGetRights'][] = 'TranslateSandbox::allowAccountCreation';
+
+			global $wgLogTypes, $wgLogActionsHandlers;
+			// log-name-translatorsandbox log-description-translatorsandbox
+			$wgLogTypes[] = 'translatorsandbox';
+			// logentry-translatorsandbox-promoted logentry-translatorsandbox-rejected
+			$wgLogActionsHandlers['translatorsandbox/promoted'] = 'TranslateLogFormatter';
+			$wgLogActionsHandlers['translatorsandbox/rejected'] = 'TranslateLogFormatter';
+
+			// This is no longer used for new entries since 2016.07.
+			// logentry-newusers-tsbpromoted
+			$wgLogActionsHandlers['newusers/tsbpromoted'] = 'LogFormatter';
+
+			global $wgJobClasses;
+			$wgJobClasses['TranslateSandboxEmailJob'] = 'TranslateSandboxEmailJob';
+
+			global $wgAPIModules;
+			$wgAPIModules['translationstash'] = 'ApiTranslationStash';
+			$wgAPIModules['translatesandbox'] = 'ApiTranslateSandbox';
+		}
+
+		// Back compatibility for MediaWiki <= 1.31
+		global $wgVersion, $wgResourceModules;
+		if ( version_compare( $wgVersion, '1.32', '<' ) ) {
+			$wgResourceModules['ext.translate.editor']['dependencies'][] = 'mediawiki.api.parse';
+			$wgResourceModules['ext.translate.special.translate']['dependencies'][] = 'mediawiki.api.parse';
+		}
+
+		global $wgNamespaceRobotPolicies;
+		$wgNamespaceRobotPolicies[NS_TRANSLATIONS] = 'noindex';
+	}
+
+	/**
+	 * Hook: UserGetReservedNames
+	 * Prevents anyone from registering or logging in as FuzzyBot
+	 *
+	 * @param array &$names
+	 */
+	public static function onUserGetReservedNames( array &$names ) {
+		global $wgTranslateFuzzyBotName;
+		$names[] = $wgTranslateFuzzyBotName;
+	}
+
+	/**
+	 * Used for setting an AbuseFilter variable.
+	 *
+	 * @param AbuseFilterVariableHolder &$vars
+	 * @param Title|null $title
+	 */
+	public static function onAbuseFilterFilterAction( &$vars, $title ) {
+		if ( !$title instanceof Title ) {
+			wfDebugLog( 'T143073', 'Got non-Title in ' . wfGetAllCallers( 5 ) );
+			return;
+		}
+
+		$handle = new MessageHandle( $title );
+
+		// Only set this variable if we are in a proper namespace to avoid
+		// unnecessary overhead in non-translation pages
+		if ( $handle->isMessageNamespace() ) {
+			$vars->setLazyLoadVar(
+				'translate_source_text',
+				'translate-get-source',
+				[ 'handle' => $handle ]
+			);
+		}
+	}
+
+	/**
+	 * Computes the translate_source_text AbuseFilter variable
+	 * @param string $method
+	 * @param AbuseFilterVariableHolder $vars
+	 * @param array $parameters
+	 * @param null &$result
+	 * @return bool
+	 */
+	public static function onAbuseFilterComputeVariable( $method, $vars, $parameters, &$result ) {
+		if ( $method !== 'translate-get-source' ) {
+			return true;
+		}
+
+		$handle = $parameters['handle'];
+		$source = '';
+		if ( $handle->isValid() ) {
+			$group = $handle->getGroup();
+			$source = $group->getMessage( $handle->getKey(), $group->getSourceLanguage() );
+		}
+
+		$result = $source;
+
+		return false;
+	}
+
+	/**
+	 * Register AbuseFilter variables provided by Translate.
+	 * @param array &$builderValues
+	 */
+	public static function onAbuseFilterBuilder( array &$builderValues ) {
+		// Uses: 'abusefilter-edit-builder-vars-translate-source-text'
+		$builderValues['vars']['translate_source_text'] = 'translate-source-text';
+	}
+
+	/**
+	 * Hook: ParserFirstCallInit
+	 * Registers \<languages> tag with the parser.
+	 *
+	 * @param Parser $parser
+	 */
+	public static function setupParserHooks( Parser $parser ) {
+		// For nice language list in-page
+		$parser->setHook( 'languages', [ 'PageTranslationHooks', 'languages' ] );
+	}
+
+	/**
+	 * Hook: UnitTestsList
+	 *
+	 * @param array &$files
+	 */
+	public static function setupUnitTests( array &$files ) {
+		$dir = __DIR__ . '/tests/phpunit';
+		$directoryIterator = new RecursiveDirectoryIterator( $dir );
+		$fileIterator = new RecursiveIteratorIterator( $directoryIterator );
+
+		/** @var SplFileInfo $fileInfo */
+		foreach ( $fileIterator as $fileInfo ) {
+			if ( substr( $fileInfo->getFilename(), -8 ) === 'Test.php' ) {
+				$files[] = $fileInfo->getPathname();
+			}
+		}
+	}
+
+	/**
+	 * Hook: LoadExtensionSchemaUpdates
+	 *
+	 * @param DatabaseUpdater $updater
+	 */
+	public static function schemaUpdates( DatabaseUpdater $updater ) {
+		$dir = __DIR__ . '/sql';
+
+		$updater->addExtensionUpdate( [
+			'addTable',
+			'translate_sections',
+			"$dir/translate_sections.sql",
+			true
+		] );
+		$updater->addExtensionUpdate( [
+			'addField',
+			'translate_sections',
+			'trs_order',
+			"$dir/translate_sections-trs_order.patch.sql",
+			true
+		] );
+		$updater->addExtensionUpdate( [
+			'addTable',
+			'revtag', "$dir/revtag.sql",
+			true
+		] );
+		$updater->addExtensionUpdate( [
+			'addTable',
+			'translate_groupstats',
+			"$dir/translate_groupstats.sql",
+			true
+		] );
+		$updater->addExtensionUpdate( [
+			'addIndex',
+			'translate_sections',
+			'trs_page_order',
+			"$dir/translate_sections-indexchange.sql",
+			true
+		] );
+		$updater->addExtensionUpdate( [
+			'dropIndex',
+			'translate_sections',
+			'trs_page',
+			"$dir/translate_sections-indexchange2.sql",
+			true
+		] );
+		$updater->addExtensionUpdate( [
+			'addTable',
+			'translate_reviews',
+			"$dir/translate_reviews.sql",
+			true
+		] );
+		$updater->addExtensionUpdate( [
+			'addTable',
+			'translate_groupreviews',
+			"$dir/translate_groupreviews.sql",
+			true
+		] );
+		$updater->addExtensionUpdate( [
+			'addTable',
+			'translate_tms',
+			"$dir/translate_tm.sql",
+			true
+		] );
+		$updater->addExtensionUpdate( [
+			'addTable',
+			'translate_metadata',
+			"$dir/translate_metadata.sql",
+			true
+		] );
+		$updater->addExtensionUpdate( [
+			'addTable', 'translate_messageindex',
+			"$dir/translate_messageindex.sql",
+			true
+		] );
+		$updater->addExtensionUpdate( [
+			'addIndex',
+			'translate_groupstats',
+			'tgs_lang',
+			"$dir/translate_groupstats-indexchange.sql",
+			true
+		] );
+		$updater->addExtensionUpdate( [
+			'addField', 'translate_groupstats',
+			'tgs_proofread',
+			"$dir/translate_groupstats-proofread.sql",
+			true
+		] );
+
+		$updater->addExtensionUpdate( [
+			'addTable',
+			'translate_stash',
+			"$dir/translate_stash.sql",
+			true
+		] );
+
+		// This also adds a PRIMARY KEY
+		$updater->addExtensionUpdate( [
+			'renameIndex',
+			'translate_reviews',
+			'trr_user_page_revision',
+			'PRIMARY',
+			false,
+			"$dir/translate_reviews-patch-01-primary-key.sql",
+			true
+		] );
+	}
+
+	/**
+	 * Hook: ParserTestTables
+	 * @param array &$tables
+	 */
+	public static function parserTestTables( array &$tables ) {
+		$tables[] = 'revtag';
+		$tables[] = 'translate_groupstats';
+		$tables[] = 'translate_messageindex';
+		$tables[] = 'translate_stash';
+	}
+
+	/**
+	 * Hook: PageContentLanguage
+	 * Set the correct page content language for translation units.
+	 *
+	 * @param Title $title
+	 * @param Language|StubUserLang|string &$pageLang
+	 */
+	public static function onPageContentLanguage( Title $title, &$pageLang ) {
+		$handle = new MessageHandle( $title );
+		if ( $handle->isMessageNamespace() ) {
+			$pageLang = $handle->getEffectiveLanguage();
+		}
+	}
+
+	/**
+	 * Hook: LanguageGetTranslatedLanguageNames
+	 * Hook: TranslateSupportedLanguages
+	 * @param array &$names
+	 * @param string $code
+	 */
+	public static function translateMessageDocumentationLanguage( array &$names, $code ) {
+		global $wgTranslateDocumentationLanguageCode;
+		if ( $wgTranslateDocumentationLanguageCode ) {
+			// Special case the autonyms
+			if (
+				$wgTranslateDocumentationLanguageCode === $code ||
+				$code === null
+			) {
+				$code = 'en';
+			}
+
+			$names[$wgTranslateDocumentationLanguageCode] =
+				wfMessage( 'translate-documentation-language' )->inLanguage( $code )->plain();
+		}
+	}
+
+	/**
+	 * Hook: SpecialSearchProfiles
+	 * @param array &$profiles
+	 */
+	public static function searchProfile( array &$profiles ) {
+		global $wgTranslateMessageNamespaces;
+		$insert = [];
+		$insert['translation'] = [
+			'message' => 'translate-searchprofile',
+			'tooltip' => 'translate-searchprofile-tooltip',
+			'namespaces' => $wgTranslateMessageNamespaces,
+		];
+
+		// Insert translations before 'all'
+		$index = array_search( 'all', array_keys( $profiles ) );
+
+		// Or just at the end if all is not found
+		if ( $index === false ) {
+			wfWarn( '"all" not found in search profiles' );
+			$index = count( $profiles );
+		}
+
+		$profiles = array_merge(
+			array_slice( $profiles, 0, $index ),
+			$insert,
+			array_slice( $profiles, $index )
+		);
+	}
+
+	/**
+	 * Hook: SpecialSearchProfileForm
+	 * @param SpecialSearch $search
+	 * @param string &$form
+	 * @param string $profile
+	 * @param string $term
+	 * @param array $opts
+	 * @return bool
+	 */
+	public static function searchProfileForm(
+		SpecialSearch $search,
+		&$form,
+		$profile,
+		$term,
+		array $opts
+	) {
+		if ( $profile !== 'translation' ) {
+			return true;
+		}
+
+		$server = TTMServer::primary();
+		if ( TTMServer::primary() instanceof SearchableTTMServer ) {
+			$href = SpecialPage::getTitleFor( 'SearchTranslations' )
+				->getFullUrl( [ 'query' => $term ] );
+			$wrapper = new RawMessage( '<div class="successbox plainlinks">$1</div>' );
+			$form = $wrapper
+				->params( $search->msg( 'translate-searchprofile-note', $href )->plain() )
+				->parse();
+
+			return false;
+		}
+
+		if ( !$search->getSearchEngine()->supports( 'title-suffix-filter' ) ) {
+			return false;
+		}
+
+		$hidden = '';
+		foreach ( $opts as $key => $value ) {
+			$hidden .= Html::hidden( $key, $value );
+		}
+
+		$context = $search->getContext();
+		$code = $context->getLanguage()->getCode();
+		$selected = $context->getRequest()->getVal( 'languagefilter' );
+
+		$languages = TranslateUtils::getLanguageNames( $code );
+		ksort( $languages );
+
+		$selector = new XmlSelect( 'languagefilter', 'languagefilter' );
+		$selector->setDefault( $selected );
+		$selector->addOption( wfMessage( 'translate-search-nofilter' )->text(), '-' );
+		foreach ( $languages as $code => $name ) {
+			$selector->addOption( "$code - $name", $code );
+		}
+
+		$selector = $selector->getHTML();
+
+		$label = Xml::label(
+			wfMessage( 'translate-search-languagefilter' )->text(),
+			'languagefilter'
+		) . '&#160;';
+		$params = [ 'id' => 'mw-searchoptions' ];
+
+		$form = Xml::fieldset( false, false, $params ) .
+			$hidden . $label . $selector .
+			Html::closeElement( 'fieldset' );
+
+		return false;
+	}
+
+	/**
+	 * Hook: SpecialSearchSetupEngine
+	 * @param SpecialSearch $search
+	 * @param string $profile
+	 * @param SearchEngine $engine
+	 */
+	public static function searchProfileSetupEngine(
+		SpecialSearch $search,
+		$profile,
+		SearchEngine $engine
+	) {
+		if ( $profile !== 'translation' ) {
+			return;
+		}
+
+		$context = $search->getContext();
+		$selected = $context->getRequest()->getVal( 'languagefilter' );
+		if ( $selected !== '-' && $selected ) {
+			$engine->setFeatureData( 'title-suffix-filter', "/$selected" );
+			$search->setExtraParam( 'languagefilter', $selected );
+		}
+	}
+
+	/**
+	 * Hook: Translate:MessageGroupStats:isIncluded
+	 * @param int $id
+	 * @param string $code
+	 * @return bool
+	 */
+	public static function hideDiscouragedFromStats( $id, $code ) {
+		// Return true to keep, false to exclude
+		return MessageGroups::getPriority( $id ) !== 'discouraged';
+	}
+
+	/**
+	 * Hook: Translate:MessageGroupStats:isIncluded
+	 * @param int $id
+	 * @param string $code
+	 * @return false
+	 */
+	public static function hideRestrictedFromStats( $id, $code ) {
+		$filterLangs = TranslateMetadata::get( $id, 'prioritylangs' );
+		if ( strlen( $filterLangs ) === 0 ) {
+			// No restrictions, keep everything
+			return true;
+		}
+
+		$filter = array_flip( explode( ',', $filterLangs ) );
+
+		// If the language is in the list, return true to not hide it
+		return isset( $filter[$code] );
+	}
+
+	/**
+	 * Hook: LinksUpdate
+	 * @param LinksUpdate $updater
+	 */
+	public static function preventCategorization( LinksUpdate $updater ) {
+		$handle = new MessageHandle( $updater->getTitle() );
+		if ( $handle->isMessageNamespace() && !$handle->isDoc() ) {
+			$updater->mCategories = [];
+		}
+	}
+
+	/**
+	 * Hook: MakeGlobalVariablesScript
+	 *
+	 * Adds $wgTranslateDocumentationLanguageCode to ResourceLoader configuration
+	 * when Special:Translate is shown.
+	 * @param array &$vars
+	 * @param OutputPage $out
+	 */
+	public static function addConfig( array &$vars, OutputPage $out ) {
+		$request = $out->getRequest();
+		$title = $out->getTitle();
+		list( $alias, ) = TranslateUtils::resolveSpecialPageAlias( $title->getText() );
+
+		if ( $title->isSpecialPage()
+			&& ( $alias === 'Translate'
+				|| $alias === 'TranslationStash'
+				|| $alias === 'SearchTranslations' )
+		) {
+			global $wgTranslateDocumentationLanguageCode, $wgTranslatePermissionUrl,
+				$wgTranslateUseSandbox;
+			$vars['TranslateRight'] = $out->getUser()->isAllowed( 'translate' );
+			$vars['TranslateMessageReviewRight'] =
+				$out->getUser()->isAllowed( 'translate-messagereview' );
+			$vars['DeleteRight'] = $out->getUser()->isAllowed( 'delete' );
+			$vars['wgTranslateDocumentationLanguageCode'] = $wgTranslateDocumentationLanguageCode;
+			$vars['wgTranslatePermissionUrl'] = $wgTranslatePermissionUrl;
+			$vars['wgTranslateUseSandbox'] = $wgTranslateUseSandbox;
+		}
+	}
+
+	/**
+	 * Hook: AdminLinks
+	 * @param ALTree $tree
+	 */
+	public static function onAdminLinks( ALTree $tree ) {
+		global $wgTranslateUseSandbox;
+
+		if ( $wgTranslateUseSandbox ) {
+			$sectionLabel = wfMessage( 'adminlinks_users' )->text();
+			$row = $tree->getSection( $sectionLabel )->getRow( 'main' );
+			$row->addItem( ALItem::newFromSpecialPage( 'TranslateSandbox' ) );
+		}
+	}
+
+	/**
+	 * Hook: MergeAccountFromTo
+	 * For UserMerge extension.
+	 *
+	 * @param User $oldUser
+	 * @param User $newUser
+	 */
+	public static function onMergeAccountFromTo( User $oldUser, User $newUser ) {
+		$dbw = wfGetDB( DB_MASTER );
+
+		// Update the non-duplicate rows, we'll just delete
+		// the duplicate ones later
+		foreach ( self::$userMergeTables as $table => $field ) {
+			if ( $dbw->tableExists( $table ) ) {
+				$dbw->update(
+					$table,
+					[ $field => $newUser->getId() ],
+					[ $field => $oldUser->getId() ],
+					__METHOD__,
+					[ 'IGNORE' ]
+				);
+			}
+		}
+	}
+
+	/**
+	 * Hook: DeleteAccount
+	 * For UserMerge extension.
+	 *
+	 * @param User $oldUser
+	 */
+	public static function onDeleteAccount( User $oldUser ) {
+		$dbw = wfGetDB( DB_MASTER );
+
+		// Delete any remaining rows that didn't get merged
+		foreach ( self::$userMergeTables as $table => $field ) {
+			if ( $dbw->tableExists( $table ) ) {
+				$dbw->delete(
+					$table,
+					[ $field => $oldUser->getId() ],
+					__METHOD__
+				);
+			}
+		}
+	}
+
+	/**
+	 * Hook: AbortEmailNotification
+	 *
+	 * False aborts the email.
+	 * @param User $editor
+	 * @param Title $title
+	 * @param RecentChange $rc
+	 * @return bool
+	 */
+	public static function onAbortEmailNotificationReview(
+		User $editor,
+		Title $title,
+		RecentChange $rc
+	) {
+		if ( $rc->getAttribute( 'rc_log_type' ) === 'translationreview' ) {
+			return false;
+		}
+	}
+
+	/**
+	 * Hook: TitleIsAlwaysKnown
+	 * Make Special:MyLanguage links red if the target page doesn't exist.
+	 * A bit hacky because the core code is not so flexible.
+	 *
+	 * @param Title $target
+	 * @param bool &$isKnown
+	 * @return bool
+	 */
+	public static function onTitleIsAlwaysKnown( Title $target, &$isKnown ) {
+		if ( !$target->inNamespace( NS_SPECIAL ) ) {
+			return true;
+		}
+
+		list( $name, $subpage ) = TranslateUtils::resolveSpecialPageAlias( $target->getDBkey() );
+		if ( $name !== 'MyLanguage' ) {
+			return true;
+		}
+
+		if ( (string)$subpage === '' ) {
+			return true;
+		}
+
+		$realTarget = Title::newFromText( $subpage );
+		if ( !$realTarget || !$realTarget->exists() ) {
+			$isKnown = false;
+
+			return false;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Hook: ParserFirstCallInit
+	 * @param Parser $parser
+	 */
+	public static function setupTranslateParserFunction( Parser $parser ) {
+		$parser->setFunctionHook( 'translation', 'TranslateHooks::translateRenderParserFunction' );
+	}
+
+	/**
+	 * @param Parser $parser
+	 * @return string
+	 */
+	public static function translateRenderParserFunction( Parser $parser ) {
+		$pageTitle = $parser->getTitle();
+
+		$handle = new MessageHandle( $pageTitle );
+		$code = $handle->getCode();
+		if ( Language::isKnownLanguageTag( $code ) ) {
+			return '/' . $code;
+		}
+		return '';
+	}
+
+	/**
+	 * @param ResourceLoader $resourceLoader
+	 */
+	public static function onResourceLoaderRegisterModules( ResourceLoader $resourceLoader ) {
+		$modules = [];
+		$modules['ext.translate.recentgroups'] = [
+			'scripts' => 'resources/js/ext.translate.recentgroups.js',
+			'dependencies' => [
+				'mediawiki.storage'
+			],
+			'localBasePath' => __DIR__,
+			'remoteExtPath' => 'Translate',
+			'targets' => [ 'desktop', 'mobile' ],
+		];
+
+		$resourceLoader->register( $modules );
+	}
+}