Adjust all implementations in the server repo

Signed-off-by: Joas Schilling <coding@schilljs.com>

12 files changed, 125 insertions, 47 deletions

diff --git a/apps/comments/lib/Activity/Provider.php b/apps/comments/lib/Activity/Provider.php
index 9035087965c..170b20d7c27 100644
--- a/apps/comments/lib/Activity/Provider.php
+++ b/apps/comments/lib/Activity/Provider.php
@@ -30,9 +30,13 @@ use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\IUser;
 use OCP\IUserManager;
+use OCP\L10N\IFactory;
 
 class Provider implements IProvider {
 
+	/** @var IFactory */
+	protected $languageFactory;
+
 	/** @var IL10N */
 	protected $l;
 
@@ -52,14 +56,14 @@ class Provider implements IProvider {
 	protected $displayNames = [];
 
 	/**
-	 * @param IL10N $l
+	 * @param IFactory $languageFactory
 	 * @param IURLGenerator $url
 	 * @param ICommentsManager $commentsManager
 	 * @param IUserManager $userManager
 	 * @param IManager $activityManager
 	 */
-	public function __construct(IL10N $l, IURLGenerator $url, ICommentsManager $commentsManager, IUserManager $userManager, IManager $activityManager) {
-		$this->l = $l;
+	public function __construct(IFactory $languageFactory, IURLGenerator $url, ICommentsManager $commentsManager, IUserManager $userManager, IManager $activityManager) {
+		$this->languageFactory = $languageFactory;
 		$this->url = $url;
 		$this->commentsManager = $commentsManager;
 		$this->userManager = $userManager;
@@ -67,17 +71,20 @@ class Provider implements IProvider {
 	}
 
 	/**
+	 * @param string $language
 	 * @param IEvent $event
 	 * @param IEvent|null $previousEvent
 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse(IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'comments') {
 			throw new \InvalidArgumentException();
 		}
 
+		$this->l = $this->languageFactory->get('comments', $language);
+
 		if ($event->getSubject() === 'add_comment_subject') {
 			$this->parseMessage($event);
 			$event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'actions/comment.svg')));
diff --git a/apps/dav/lib/CalDAV/Activity/Provider/Calendar.php b/apps/dav/lib/CalDAV/Activity/Provider/Calendar.php
index 2e2ce5bc27a..d7730da61f4 100644
--- a/apps/dav/lib/CalDAV/Activity/Provider/Calendar.php
+++ b/apps/dav/lib/CalDAV/Activity/Provider/Calendar.php
@@ -27,6 +27,7 @@ use OCP\Activity\IManager;
 use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\IUserManager;
+use OCP\L10N\IFactory;
 
 class Calendar extends Base {
 
@@ -38,6 +39,9 @@ class Calendar extends Base {
 	const SUBJECT_UNSHARE_USER = 'calendar_user_unshare';
 	const SUBJECT_UNSHARE_GROUP = 'calendar_group_unshare';
 
+	/** @var IFactory */
+	protected $languageFactory;
+
 	/** @var IL10N */
 	protected $l;
 
@@ -51,32 +55,35 @@ class Calendar extends Base {
 	protected $eventMerger;
 
 	/**
-	 * @param IL10N $l
+	 * @param IFactory $languageFactory
 	 * @param IURLGenerator $url
 	 * @param IManager $activityManager
 	 * @param IUserManager $userManager
 	 * @param IEventMerger $eventMerger
 	 */
-	public function __construct(IL10N $l, IURLGenerator $url, IManager $activityManager, IUserManager $userManager, IEventMerger $eventMerger) {
+	public function __construct(IFactory $languageFactory, IURLGenerator $url, IManager $activityManager, IUserManager $userManager, IEventMerger $eventMerger) {
 		parent::__construct($userManager);
-		$this->l = $l;
+		$this->languageFactory = $languageFactory;
 		$this->url = $url;
 		$this->activityManager = $activityManager;
 		$this->eventMerger = $eventMerger;
 	}
 
 	/**
+	 * @param string $language
 	 * @param IEvent $event
 	 * @param IEvent|null $previousEvent
 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse(IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'dav' || $event->getType() !== 'calendar') {
 			throw new \InvalidArgumentException();
 		}
 
+		$this->l = $this->languageFactory->get('dav', $language);
+
 		$event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/calendar-dark.svg')));
 
 		if ($event->getSubject() === self::SUBJECT_ADD) {
diff --git a/apps/dav/lib/CalDAV/Activity/Provider/Event.php b/apps/dav/lib/CalDAV/Activity/Provider/Event.php
index 11c8d901ac9..daaace6b5be 100644
--- a/apps/dav/lib/CalDAV/Activity/Provider/Event.php
+++ b/apps/dav/lib/CalDAV/Activity/Provider/Event.php
@@ -27,6 +27,7 @@ use OCP\Activity\IManager;
 use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\IUserManager;
+use OCP\L10N\IFactory;
 
 class Event extends Base {
 
@@ -34,6 +35,9 @@ class Event extends Base {
 	const SUBJECT_OBJECT_UPDATE = 'object_update';
 	const SUBJECT_OBJECT_DELETE = 'object_delete';
 
+	/** @var IFactory */
+	protected $languageFactory;
+
 	/** @var IL10N */
 	protected $l;
 
@@ -47,32 +51,35 @@ class Event extends Base {
 	protected $eventMerger;
 
 	/**
-	 * @param IL10N $l
+	 * @param IFactory $languageFactory
 	 * @param IURLGenerator $url
 	 * @param IManager $activityManager
 	 * @param IUserManager $userManager
 	 * @param IEventMerger $eventMerger
 	 */
-	public function __construct(IL10N $l, IURLGenerator $url, IManager $activityManager, IUserManager $userManager, IEventMerger $eventMerger) {
+	public function __construct(IFactory $languageFactory, IURLGenerator $url, IManager $activityManager, IUserManager $userManager, IEventMerger $eventMerger) {
 		parent::__construct($userManager);
-		$this->l = $l;
+		$this->languageFactory = $languageFactory;
 		$this->url = $url;
 		$this->activityManager = $activityManager;
 		$this->eventMerger = $eventMerger;
 	}
 
 	/**
+	 * @param string $language
 	 * @param IEvent $event
 	 * @param IEvent|null $previousEvent
 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse(IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'dav' || $event->getType() !== 'calendar_event') {
 			throw new \InvalidArgumentException();
 		}
 
+		$this->l = $this->languageFactory->get('dav', $language);
+
 		$event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'places/calendar-dark.svg')));
 
 		if ($event->getSubject() === self::SUBJECT_OBJECT_ADD . '_event') {
diff --git a/apps/dav/lib/CalDAV/Activity/Provider/Todo.php b/apps/dav/lib/CalDAV/Activity/Provider/Todo.php
index 43ab9e9c448..747b39ddb7f 100644
--- a/apps/dav/lib/CalDAV/Activity/Provider/Todo.php
+++ b/apps/dav/lib/CalDAV/Activity/Provider/Todo.php
@@ -26,17 +26,20 @@ use OCP\Activity\IEvent;
 class Todo extends Event {
 
 	/**
+	 * @param string $language
 	 * @param IEvent $event
 	 * @param IEvent|null $previousEvent
 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse(IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'dav' || $event->getType() !== 'calendar_todo') {
 			throw new \InvalidArgumentException();
 		}
 
+		$this->l = $this->languageFactory->get('dav', $language);
+
 		$event->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'actions/checkmark.svg')));
 
 		if ($event->getSubject() === self::SUBJECT_OBJECT_ADD . '_todo') {
diff --git a/apps/files/lib/Activity/Provider.php b/apps/files/lib/Activity/Provider.php
index 863e7644059..92686ec0c36 100644
--- a/apps/files/lib/Activity/Provider.php
+++ b/apps/files/lib/Activity/Provider.php
@@ -29,9 +29,13 @@ use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\IUser;
 use OCP\IUserManager;
+use OCP\L10N\IFactory;
 
 class Provider implements IProvider {
 
+	/** @var IFactory */
+	protected $languageFactory;
+
 	/** @var IL10N */
 	protected $l;
 
@@ -51,14 +55,14 @@ class Provider implements IProvider {
 	protected $displayNames = [];
 
 	/**
-	 * @param IL10N $l
+	 * @param IFactory $languageFactory
 	 * @param IURLGenerator $url
 	 * @param IManager $activityManager
 	 * @param IUserManager $userManager
 	 * @param IEventMerger $eventMerger
 	 */
-	public function __construct(IL10N $l, IURLGenerator $url, IManager $activityManager, IUserManager $userManager, IEventMerger $eventMerger) {
-		$this->l = $l;
+	public function __construct(IFactory $languageFactory, IURLGenerator $url, IManager $activityManager, IUserManager $userManager, IEventMerger $eventMerger) {
+		$this->languageFactory = $languageFactory;
 		$this->url = $url;
 		$this->activityManager = $activityManager;
 		$this->userManager = $userManager;
@@ -66,17 +70,20 @@ class Provider implements IProvider {
 	}
 
 	/**
+	 * @param string $language
 	 * @param IEvent $event
 	 * @param IEvent|null $previousEvent
 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse(IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'files') {
 			throw new \InvalidArgumentException();
 		}
 
+		$this->l = $this->languageFactory->get('files', $language);
+
 		if ($this->activityManager->isFormattingFilteredObject()) {
 			try {
 				return $this->parseShortVersion($event, $previousEvent);
diff --git a/apps/files_sharing/lib/Activity/Providers/Downloads.php b/apps/files_sharing/lib/Activity/Providers/Downloads.php
index 39e2a846b30..e1a25156441 100644
--- a/apps/files_sharing/lib/Activity/Providers/Downloads.php
+++ b/apps/files_sharing/lib/Activity/Providers/Downloads.php
@@ -26,9 +26,13 @@ use OCP\Activity\IManager;
 use OCP\Activity\IProvider;
 use OCP\IL10N;
 use OCP\IURLGenerator;
+use OCP\L10N\IFactory;
 
 class Downloads implements IProvider {
 
+	/** @var IFactory */
+	protected $languageFactory;
+
 	/** @var IL10N */
 	protected $l;
 
@@ -45,28 +49,31 @@ class Downloads implements IProvider {
 	const SUBJECT_SHARED_FOLDER_BY_EMAIL_DOWNLOADED = 'folder_shared_with_email_downloaded';
 
 	/**
-	 * @param IL10N $l
+	 * @param IFactory $languageFactory
 	 * @param IURLGenerator $url
 	 * @param IManager $activityManager
 	 */
-	public function __construct(IL10N $l, IURLGenerator $url, IManager $activityManager) {
-		$this->l = $l;
+	public function __construct(IFactory $languageFactory, IURLGenerator $url, IManager $activityManager) {
+		$this->languageFactory = $languageFactory;
 		$this->url = $url;
 		$this->activityManager = $activityManager;
 	}
 
 	/**
+	 * @param string $language
 	 * @param IEvent $event
 	 * @param IEvent|null $previousEvent
 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse(IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'files_sharing') {
 			throw new \InvalidArgumentException();
 		}
 
+		$this->l = $this->languageFactory->get('files_sharing', $language);
+
 		if ($this->activityManager->isFormattingFilteredObject()) {
 			try {
 				return $this->parseShortVersion($event);
diff --git a/apps/files_sharing/lib/Activity/Providers/Groups.php b/apps/files_sharing/lib/Activity/Providers/Groups.php
index c42cc1bb59b..326ebba9ef7 100644
--- a/apps/files_sharing/lib/Activity/Providers/Groups.php
+++ b/apps/files_sharing/lib/Activity/Providers/Groups.php
@@ -28,9 +28,13 @@ use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\IUser;
 use OCP\IUserManager;
+use OCP\L10N\IFactory;
 
 class Groups implements IProvider {
 
+	/** @var IFactory */
+	protected $languageFactory;
+
 	/** @var IL10N */
 	protected $l;
 
@@ -53,30 +57,33 @@ class Groups implements IProvider {
 
 
 	/**
-	 * @param IL10N $l
+	 * @param IFactory $languageFactory
 	 * @param IURLGenerator $url
 	 * @param IManager $activityManager
 	 * @param IUserManager $userManager
 	 */
-	public function __construct(IL10N $l, IURLGenerator $url, IManager $activityManager, IUserManager $userManager) {
-		$this->l = $l;
+	public function __construct(IFactory $languageFactory, IURLGenerator $url, IManager $activityManager, IUserManager $userManager) {
+		$this->languageFactory = $languageFactory;
 		$this->url = $url;
 		$this->activityManager = $activityManager;
 		$this->userManager = $userManager;
 	}
 
 	/**
+	 * @param string $language
 	 * @param IEvent $event
 	 * @param IEvent|null $previousEvent
 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse(IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'files_sharing') {
 			throw new \InvalidArgumentException();
 		}
 
+		$this->l = $this->languageFactory->get('files_sharing', $language);
+
 		if ($this->activityManager->isFormattingFilteredObject()) {
 			try {
 				return $this->parseShortVersion($event);
diff --git a/apps/files_sharing/lib/Activity/Providers/PublicLinks.php b/apps/files_sharing/lib/Activity/Providers/PublicLinks.php
index a1c6333a86b..ec8152c5a32 100644
--- a/apps/files_sharing/lib/Activity/Providers/PublicLinks.php
+++ b/apps/files_sharing/lib/Activity/Providers/PublicLinks.php
@@ -28,9 +28,13 @@ use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\IUser;
 use OCP\IUserManager;
+use OCP\L10N\IFactory;
 
 class PublicLinks implements IProvider {
 
+	/** @var IFactory */
+	protected $languageFactory;
+
 	/** @var IL10N */
 	protected $l;
 
@@ -55,30 +59,33 @@ class PublicLinks implements IProvider {
 
 
 	/**
-	 * @param IL10N $l
+	 * @param IFactory $languageFactory
 	 * @param IURLGenerator $url
 	 * @param IManager $activityManager
 	 * @param IUserManager $userManager
 	 */
-	public function __construct(IL10N $l, IURLGenerator $url, IManager $activityManager, IUserManager $userManager) {
-		$this->l = $l;
+	public function __construct(IFactory $languageFactory, IURLGenerator $url, IManager $activityManager, IUserManager $userManager) {
+		$this->languageFactory = $languageFactory;
 		$this->url = $url;
 		$this->activityManager = $activityManager;
 		$this->userManager = $userManager;
 	}
 
 	/**
+	 * @param string $language
 	 * @param IEvent $event
 	 * @param IEvent|null $previousEvent
 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse(IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'files_sharing') {
 			throw new \InvalidArgumentException();
 		}
 
+		$this->l = $this->languageFactory->get('files_sharing', $language);
+
 		if ($this->activityManager->isFormattingFilteredObject()) {
 			try {
 				return $this->parseShortVersion($event);
diff --git a/apps/files_sharing/lib/Activity/Providers/RemoteShares.php b/apps/files_sharing/lib/Activity/Providers/RemoteShares.php
index 8760733a261..3ee5d82e932 100644
--- a/apps/files_sharing/lib/Activity/Providers/RemoteShares.php
+++ b/apps/files_sharing/lib/Activity/Providers/RemoteShares.php
@@ -26,11 +26,13 @@ use OCP\Activity\IManager;
 use OCP\Activity\IProvider;
 use OCP\IL10N;
 use OCP\IURLGenerator;
-use OCP\IUser;
-use OCP\IUserManager;
+use OCP\L10N\IFactory;
 
 class RemoteShares implements IProvider {
 
+	/** @var IFactory */
+	protected $languageFactory;
+
 	/** @var IL10N */
 	protected $l;
 
@@ -46,28 +48,31 @@ class RemoteShares implements IProvider {
 	const SUBJECT_REMOTE_SHARE_UNSHARED = 'remote_share_unshared';
 
 	/**
-	 * @param IL10N $l
+	 * @param IFactory $languageFactory
 	 * @param IURLGenerator $url
 	 * @param IManager $activityManager
 	 */
-	public function __construct(IL10N $l, IURLGenerator $url, IManager $activityManager) {
-		$this->l = $l;
+	public function __construct(IFactory $languageFactory, IURLGenerator $url, IManager $activityManager) {
+		$this->languageFactory = $languageFactory;
 		$this->url = $url;
 		$this->activityManager = $activityManager;
 	}
 
 	/**
+	 * @param string $language
 	 * @param IEvent $event
 	 * @param IEvent|null $previousEvent
 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse(IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'files_sharing') {
 			throw new \InvalidArgumentException();
 		}
 
+		$this->l = $this->languageFactory->get('files_sharing', $language);
+
 		if ($this->activityManager->isFormattingFilteredObject()) {
 			try {
 				return $this->parseShortVersion($event);
diff --git a/apps/files_sharing/lib/Activity/Providers/Users.php b/apps/files_sharing/lib/Activity/Providers/Users.php
index c85452aec06..d85eeadc315 100644
--- a/apps/files_sharing/lib/Activity/Providers/Users.php
+++ b/apps/files_sharing/lib/Activity/Providers/Users.php
@@ -28,9 +28,13 @@ use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\IUser;
 use OCP\IUserManager;
+use OCP\L10N\IFactory;
 
 class Users implements IProvider {
 
+	/** @var IFactory */
+	protected $languageFactory;
+
 	/** @var IL10N */
 	protected $l;
 
@@ -55,30 +59,33 @@ class Users implements IProvider {
 	const SUBJECT_UNSHARED_BY = 'unshared_by';
 
 	/**
-	 * @param IL10N $l
+	 * @param IFactory $languageFactory
 	 * @param IURLGenerator $url
 	 * @param IManager $activityManager
 	 * @param IUserManager $userManager
 	 */
-	public function __construct(IL10N $l, IURLGenerator $url, IManager $activityManager, IUserManager $userManager) {
-		$this->l = $l;
+	public function __construct(IFactory $languageFactory, IURLGenerator $url, IManager $activityManager, IUserManager $userManager) {
+		$this->languageFactory = $languageFactory;
 		$this->url = $url;
 		$this->activityManager = $activityManager;
 		$this->userManager = $userManager;
 	}
 
 	/**
+	 * @param string $language
 	 * @param IEvent $event
 	 * @param IEvent|null $previousEvent
 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse(IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'files_sharing') {
 			throw new \InvalidArgumentException();
 		}
 
+		$this->l = $this->languageFactory->get('files_sharing', $language);
+
 		if ($this->activityManager->isFormattingFilteredObject()) {
 			try {
 				return $this->parseShortVersion($event);
diff --git a/apps/sharebymail/lib/Activity.php b/apps/sharebymail/lib/Activity.php
index 58ab0a5cdcd..5342d013ade 100644
--- a/apps/sharebymail/lib/Activity.php
+++ b/apps/sharebymail/lib/Activity.php
@@ -29,9 +29,13 @@ use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\IUser;
 use OCP\IUserManager;
+use OCP\L10N\IFactory;
 
 class Activity implements IProvider {
 
+	/** @var IFactory */
+	protected $languageFactory;
+
 	/** @var IL10N */
 	protected $l;
 
@@ -56,14 +60,14 @@ class Activity implements IProvider {
 	const SUBJECT_SHARED_EMAIL_BY = 'shared_with_email_by';
 
 	/**
-	 * @param IL10N $l
+	 * @param IFactory $languageFactory
 	 * @param IURLGenerator $url
 	 * @param IManager $activityManager
 	 * @param IUserManager $userManager
 	 * @param IContactsManager $contactsManager
 	 */
-	public function __construct(IL10N $l, IURLGenerator $url, IManager $activityManager, IUserManager $userManager, IContactsManager $contactsManager) {
-		$this->l = $l;
+	public function __construct(IFactory $languageFactory, IURLGenerator $url, IManager $activityManager, IUserManager $userManager, IContactsManager $contactsManager) {
+		$this->languageFactory = $languageFactory;
 		$this->url = $url;
 		$this->activityManager = $activityManager;
 		$this->userManager = $userManager;
@@ -71,17 +75,20 @@ class Activity implements IProvider {
 	}
 
 	/**
+	 * @param string $language
 	 * @param IEvent $event
 	 * @param IEvent|null $previousEvent
 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse(IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'sharebymail') {
 			throw new \InvalidArgumentException();
 		}
 
+		$this->l = $this->languageFactory->get('sharebymail', $language);
+
 		if ($this->activityManager->isFormattingFilteredObject()) {
 			try {
 				return $this->parseShortVersion($event);
diff --git a/apps/systemtags/lib/Activity/Provider.php b/apps/systemtags/lib/Activity/Provider.php
index 37ede8c3b8f..5ef20c281bd 100644
--- a/apps/systemtags/lib/Activity/Provider.php
+++ b/apps/systemtags/lib/Activity/Provider.php
@@ -28,6 +28,7 @@ use OCP\IL10N;
 use OCP\IURLGenerator;
 use OCP\IUser;
 use OCP\IUserManager;
+use OCP\L10N\IFactory;
 
 class Provider implements IProvider {
 
@@ -38,6 +39,9 @@ class Provider implements IProvider {
 	const ASSIGN_TAG = 'assign_tag';
 	const UNASSIGN_TAG = 'unassign_tag';
 
+	/** @var IFactory */
+	protected $languageFactory;
+
 	/** @var IL10N */
 	protected $l;
 
@@ -54,30 +58,33 @@ class Provider implements IProvider {
 	protected $displayNames = [];
 
 	/**
-	 * @param IL10N $l
+	 * @param IFactory $languageFactory
 	 * @param IURLGenerator $url
 	 * @param IManager $activityManager
 	 * @param IUserManager $userManager
 	 */
-	public function __construct(IL10N $l, IURLGenerator $url, IManager $activityManager, IUserManager $userManager) {
-		$this->l = $l;
+	public function __construct(IFactory $languageFactory, IURLGenerator $url, IManager $activityManager, IUserManager $userManager) {
+		$this->languageFactory = $languageFactory;
 		$this->url = $url;
 		$this->activityManager = $activityManager;
 		$this->userManager = $userManager;
 	}
 
 	/**
+	 * @param string $language
 	 * @param IEvent $event
 	 * @param IEvent|null $previousEvent
 	 * @return IEvent
 	 * @throws \InvalidArgumentException
 	 * @since 11.0.0
 	 */
-	public function parse(IEvent $event, IEvent $previousEvent = null) {
+	public function parse($language, IEvent $event, IEvent $previousEvent = null) {
 		if ($event->getApp() !== 'systemtags') {
 			throw new \InvalidArgumentException();
 		}
 
+		$this->l = $this->languageFactory->get('systemtags', $language);
+
 		if ($this->activityManager->isFormattingFilteredObject()) {
 			try {
 				return $this->parseShortVersion($event);