diff --git a/includes/Api/ApiTitleBlacklist.php b/includes/Api/ApiTitleBlacklist.php
index d22a68eb..3fa7465f 100644
--- a/includes/Api/ApiTitleBlacklist.php
+++ b/includes/Api/ApiTitleBlacklist.php
@@ -72,7 +72,12 @@ class ApiTitleBlacklist extends ApiBase {
 			$res->addValue( 'titleblacklist', 'result', 'blacklisted' );
 			// there aren't any messages for create(talk|page), using edit for those instead
 			$message = $blacklisted->getErrorMessage( $action !== 'create' ? $action : 'edit' );
-			$res->addValue( 'titleblacklist', 'reason', $this->msg( $message, $result )->page( $title )->text() );
+			$messageObj = $this->msg( $message, $result )->page( $title );
+			if ( $this->getErrorFormatter()->getFormat() === 'html' ) {
+				$res->addValue( 'titleblacklist', 'reason', $messageObj->parse() );
+			} else {
+				$res->addValue( 'titleblacklist', 'reason', $messageObj->text() );
+			}
 			$res->addValue( 'titleblacklist', 'message', $message );
 			$res->addValue( 'titleblacklist', 'line', htmlspecialchars( $blacklisted->getRaw() ) );
 		} else {
diff --git a/modules/mediawiki.api.titleblacklist.js b/modules/mediawiki.api.titleblacklist.js
index 10e9823c..7e82c3f3 100644
--- a/modules/mediawiki.api.titleblacklist.js
+++ b/modules/mediawiki.api.titleblacklist.js
@@ -25,7 +25,11 @@
 			this.get( {
 				action: 'titleblacklist',
 				tbaction: 'create',
-				tbtitle: title.toString()
+				tbtitle: title.toString(),
+				errorformat: 'html',
+				errorlang: mw.config.get( 'wgUserLanguage' ),
+				errorsuselocal: '',
+				formatversion: 2
 			} )
 				.done( function ( data ) {
 					var result;