diff --git a/resources/lang/cy/auth.php b/resources/lang/cy/auth.php
index a23ff930f..09222a0ec 100644
--- a/resources/lang/cy/auth.php
+++ b/resources/lang/cy/auth.php
@@ -10,6 +10,6 @@ return [
     | these language lines according to your application's requirements.
     |
     */
-    'failed'   => 'Nid yw'r manylion mewngofnodi hyn yn cyd-fynd â'n cofnodion.',
+    'failed'   => 'Nid yw\'r manylion mewngofnodi hyn yn cyd-fynd â\'n cofnodion.',
     'throttle' => 'Gormod o ymdrechion mewngofnodi. Rhowch gynnig arall arni mewn :seconds eiliadau.',
 ];