diff --git a/homeassistant/components/casper_glow/__init__.py b/homeassistant/components/casper_glow/__init__.py
index 18368a84435..61c00e0306b 100644
--- a/homeassistant/components/casper_glow/__init__.py
+++ b/homeassistant/components/casper_glow/__init__.py
@@ -7,6 +7,7 @@ from homeassistant.const import CONF_ADDRESS, Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryNotReady
 
+from .const import DOMAIN
 from .coordinator import CasperGlowConfigEntry, CasperGlowCoordinator
 
 PLATFORMS: list[Platform] = [
@@ -24,7 +25,9 @@ async def async_setup_entry(hass: HomeAssistant, entry: CasperGlowConfigEntry) -
     ble_device = bluetooth.async_ble_device_from_address(hass, address.upper(), True)
     if not ble_device:
         raise ConfigEntryNotReady(
-            f"Could not find Casper Glow device with address {address}"
+            translation_domain=DOMAIN,
+            translation_key="device_not_found",
+            translation_placeholders={"address": address},
         )
 
     glow = CasperGlow(ble_device)
diff --git a/homeassistant/components/casper_glow/strings.json b/homeassistant/components/casper_glow/strings.json
index afe72eb0c01..0429ca0781a 100644
--- a/homeassistant/components/casper_glow/strings.json
+++ b/homeassistant/components/casper_glow/strings.json
@@ -54,6 +54,9 @@
   "exceptions": {
     "communication_error": {
       "message": "An error occurred while communicating with the Casper Glow: {error}"
+    },
+    "device_not_found": {
+      "message": "Could not find Casper Glow device with address {address}"
     }
   }
 }