diff --git a/app/src/main/res/values-cy/strings.xml b/app/src/main/res/values-cy/strings.xml
index 21b797e79..5a516c6b3 100644
--- a/app/src/main/res/values-cy/strings.xml
+++ b/app/src/main/res/values-cy/strings.xml
@@ -1182,4 +1182,7 @@
     <string name="apply_changes">Apply changes</string>
     <string name="restart_message">You need to restart the application to apply changes</string>
     <string name="restart">Restart</string>
+    <string name="pref_custom_theme">Use a custom theme</string>
+    <string name="pref_custom_theme_summary">Allow to override colors of the  selected theme above</string>
+    <string name="theming">Theming</string>
 </resources>