diff --git a/apps/comments/lib/Notification/Notifier.php b/apps/comments/lib/Notification/Notifier.php
index ead68840a4f37d0ff35da94370ee9eeca29f7d4d..ac97cb6f7c97d02072b4ce52a3cd3fee9142ad72 100644
--- a/apps/comments/lib/Notification/Notifier.php
+++ b/apps/comments/lib/Notification/Notifier.php
@@ -24,10 +24,12 @@
 
 namespace OCA\Comments\Notification;
 
+use OCP\Comments\IComment;
 use OCP\Comments\ICommentsManager;
 use OCP\Comments\NotFoundException;
 use OCP\Files\IRootFolder;
 use OCP\IURLGenerator;
+use OCP\IUser;
 use OCP\IUserManager;
 use OCP\L10N\IFactory;
 use OCP\Notification\INotification;
@@ -83,9 +85,9 @@ class Notifier implements INotifier {
 		$l = $this->l10nFactory->get('comments', $languageCode);
 		$displayName = $comment->getActorId();
 		$isDeletedActor = $comment->getActorType() === ICommentsManager::DELETED_USER;
-		if($comment->getActorType() === 'users') {
+		if ($comment->getActorType() === 'users') {
 			$commenter = $this->userManager->get($comment->getActorId());
-			if(!is_null($commenter)) {
+			if ($commenter instanceof IUser) {
 				$displayName = $commenter->getDisplayName();
 			}
 		}
@@ -93,7 +95,7 @@ class Notifier implements INotifier {
 		switch($notification->getSubject()) {
 			case 'mention':
 				$parameters = $notification->getSubjectParameters();
-				if($parameters[0] !== 'files') {
+				if ($parameters[0] !== 'files') {
 					throw new \InvalidArgumentException('Unsupported comment object');
 				}
 				$userFolder = $this->rootFolder->getUserFolder($notification->getUser());
@@ -103,47 +105,41 @@ class Notifier implements INotifier {
 				}
 				$node = $nodes[0];
 
+				$path = rtrim($node->getPath(), '/');
+				if (strpos($path, '/' . $notification->getUser() . '/files/') === 0) {
+					// Remove /user/files/...
+					$fullPath = $path;
+					list(,,, $path) = explode('/', $fullPath, 4);
+				}
+
+				$subjectParameters = [
+					'file' => [
+						'type' => 'file',
+						'id' => $comment->getObjectId(),
+						'name' => $node->getName(),
+						'path' => $path,
+						'link' => $this->url->linkToRouteAbsolute('files.viewcontroller.showFile', ['fileid' => $comment->getObjectId()]),
+					],
+				];
+
 				if ($isDeletedActor) {
-					$notification->setParsedSubject($l->t(
-							'You were mentioned on “%s”, in a comment by a user that has since been deleted',
-							[$node->getName()]
-						))
-						->setRichSubject(
-							$l->t('You were mentioned on “{file}”, in a comment by a user that has since been deleted'),
-							[
-								'file' => [
-									'type' => 'file',
-									'id' => $comment->getObjectId(),
-									'name' => $node->getName(),
-									'path' => $node->getPath(),
-									'link' => $this->url->linkToRouteAbsolute('files.viewcontroller.showFile', ['fileid' => $comment->getObjectId()]),
-								],
-							]
-						);
+					$subject = $l->t('You were mentioned on “{file}”, in a comment by a user that has since been deleted');
 				} else {
-					$notification->setParsedSubject($l->t(
-							'%1$s mentioned you in a comment on “%2$s”',
-							[$displayName, $node->getName()]
-						))
-						->setRichSubject(
-							$l->t('{user} mentioned you in a comment on “{file}”'),
-							[
-								'user' => [
-									'type' => 'user',
-									'id' => $comment->getActorId(),
-									'name' => $displayName,
-								],
-								'file' => [
-									'type' => 'file',
-									'id' => $comment->getObjectId(),
-									'name' => $node->getName(),
-									'path' => $node->getPath(),
-									'link' => $this->url->linkToRouteAbsolute('files.viewcontroller.showFile', ['fileid' => $comment->getObjectId()]),
-								],
-							]
-						);
+					$subject = $l->t('{user} mentioned you in a comment on “{file}”');
+					$subjectParameters['user'] = [
+						'type' => 'user',
+						'id' => $comment->getActorId(),
+						'name' => $displayName,
+					];
 				}
-				$notification->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'actions/comment.svg')))
+
+				list($message, $messageParameters) = $this->commentToRichMessage($comment);
+
+				$notification->setRichSubject($subject, $subjectParameters)
+					->setParsedSubject($this->richToParsed($subject, $subjectParameters))
+					->setRichMessage($message, $messageParameters)
+					->setParsedMessage($this->richToParsed($message, $messageParameters))
+					->setIcon($this->url->getAbsoluteURL($this->url->imagePath('core', 'actions/comment.svg')))
 					->setLink($this->url->linkToRouteAbsolute(
 						'comments.Notifications.view',
 						['id' => $comment->getId()])
@@ -157,4 +153,66 @@ class Notifier implements INotifier {
 		}
 
 	}
+
+	public function commentToRichMessage(IComment $comment): array {
+		$message = $comment->getMessage();
+		$messageParameters = [];
+
+		$mentionTypeCount = [];
+
+		$mentions = $comment->getMentions();
+		foreach ($mentions as $mention) {
+			if ($mention['type'] === 'user') {
+				$user = $this->userManager->get($mention['id']);
+				if (!$user instanceof IUser) {
+					continue;
+				}
+			}
+
+			if (!array_key_exists($mention['type'], $mentionTypeCount)) {
+				$mentionTypeCount[$mention['type']] = 0;
+			}
+			$mentionTypeCount[$mention['type']]++;
+
+			// To keep a limited character set in parameter IDs ([a-zA-Z0-9-])
+			// the mention parameter ID does not include the mention ID (which
+			// could contain characters like '@' for user IDs) but a one-based
+			// index of the mentions of that type.
+			$mentionParameterId = 'mention-' . $mention['type'] . $mentionTypeCount[$mention['type']];
+
+			$message = str_replace('@' . $mention['id'], '{' . $mentionParameterId . '}', $message);
+
+			try {
+				$displayName = $this->commentsManager->resolveDisplayName($mention['type'], $mention['id']);
+			} catch (\OutOfBoundsException $e) {
+				// There is no registered display name resolver for the mention
+				// type, so the client decides what to display.
+				$displayName = '';
+			}
+
+			$messageParameters[$mentionParameterId] = [
+				'type' => $mention['type'],
+				'id' => $mention['id'],
+				'name' => $displayName
+			];
+		}
+
+		return [$message, $messageParameters];
+	}
+
+	public function richToParsed(string $message, array $parameters): string {
+		$placeholders = $replacements = [];
+		foreach ($parameters as $placeholder => $parameter) {
+			$placeholders[] = '{' . $placeholder . '}';
+			if ($parameter['type'] === 'user') {
+				$replacements[] = '@' . $parameter['name'];
+			} else if ($parameter['type'] === 'file') {
+				$replacements[] = $parameter['path'];
+			} else {
+				$replacements[] = $parameter['name'];
+			}
+		}
+
+		return str_replace($placeholders, $replacements, $message);
+	}
 }