diff --git a/resources/lang/cy/auth.php b/resources/lang/cy/auth.php
new file mode 100644
index 00000000..a23ff930
--- /dev/null
+++ b/resources/lang/cy/auth.php
@@ -0,0 +1,15 @@
+<?php
+return [
+    /*
+    |--------------------------------------------------------------------------
+    | Authentication Language Lines
+    |--------------------------------------------------------------------------
+    |
+    | The following language lines are used during authentication for various
+    | messages that we need to display to the user. You are free to modify
+    | these language lines according to your application's requirements.
+    |
+    */
+    '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.',
+];