diff --git a/app/src/main/res/values-cy/strings.xml b/app/src/main/res/values-cy/strings.xml
index 5e865235c..2a1487737 100644
--- a/app/src/main/res/values-cy/strings.xml
+++ b/app/src/main/res/values-cy/strings.xml
@@ -1168,4 +1168,6 @@
     <string name="reset">Reset</string>
     <string name="icons_color_title">Icons</string>
     <string name="icons_color">Color of bottom icons in timelines</string>
+    <string name="background_color_title">Background</string>
+    <string name="background_color">Change the background color for timelines</string>
 </resources>