diff --git a/homeassistant/components/fronius/strings.json b/homeassistant/components/fronius/strings.json
index b77f6fec83c..36778f2ca5f 100644
--- a/homeassistant/components/fronius/strings.json
+++ b/homeassistant/components/fronius/strings.json
@@ -182,10 +182,10 @@
         "state": {
           "startup": "Startup",
           "running": "Running",
-          "standby": "Standby",
+          "standby": "[%key:common::state::standby%]",
           "bootloading": "Bootloading",
           "error": "Error",
-          "idle": "Idle",
+          "idle": "[%key:common::state::idle%]",
           "ready": "Ready",
           "sleeping": "Sleeping"
         }