diff --git a/app/src/main/res/values-cy/strings.xml b/app/src/main/res/values-cy/strings.xml
index d04bb1a1e..85d4fcdce 100644
--- a/app/src/main/res/values-cy/strings.xml
+++ b/app/src/main/res/values-cy/strings.xml
@@ -778,6 +778,7 @@
     <string name="action_html">HTML</string>
     <string name="action_markdown">Markdown</string>
     <string name="action_logout_account">Logout account</string>
+    <string name="set_optimize_loading">Optimize loading time</string>
     <!-- end languages -->
     <string-array name="settings_video_mode">
         <item>Webview</item>