diff --git a/app/src/main/res/values-cy/strings.xml b/app/src/main/res/values-cy/strings.xml
index aebecd9f0..464adcaa5 100644
--- a/app/src/main/res/values-cy/strings.xml
+++ b/app/src/main/res/values-cy/strings.xml
@@ -836,6 +836,11 @@
     <string name="move_timeline">Move timeline</string>
     <string name="hide_timeline">Hide timeline</string>
     <string name="reorder_timelines">Reorder timelines</string>
+    <string name="undo">Undo</string>
+    <string name="visible_tabs_needed">You need to keep two visible tabs!</string>
+    <string name="action_reorder_timeline">Reorder timelines</string>
+    <string name="warning_list_deletion">Use the lists entry for deleting this list!</string>
+    <string name="warning_main_timeline">Main timelines can only be hidden!</string>
     <plurals name="number_of_vote">
         <item quantity="zero">%d votes</item>
         <item quantity="one">%d vote</item>