diff --git a/src/i18n/strings/cy.json b/src/i18n/strings/cy.json
index aa51736d86..b1a7807768 100644
--- a/src/i18n/strings/cy.json
+++ b/src/i18n/strings/cy.json
@@ -810,6 +810,10 @@
         },
         "developer_mode": "Modd datblygwr",
         "developer_tools": "Offer Datblygwr",
+        "device_dehydrated_no": "Dadhydredig: Na",
+        "device_dehydrated_yes": "Dadhydredig: Ydyw",
+        "device_id": "ID dyfais: %(deviceId)s",
+        "device_keys": "Allweddi dyfais",
         "edit_setting": "Golygu gosodiad",
         "edit_values": "Golygu gwerthoedd",
         "empty_string": "<empty string>",