diff --git a/homeassistant/components/co2signal/sensor.py b/homeassistant/components/co2signal/sensor.py
index 680220371b4..9f133c0b0ca 100644
--- a/homeassistant/components/co2signal/sensor.py
+++ b/homeassistant/components/co2signal/sensor.py
@@ -35,13 +35,13 @@ class CO2SensorEntityDescription(SensorEntityDescription):
 SENSORS = (
     CO2SensorEntityDescription(
         key="carbonIntensity",
-        name="CO2 intensity",
+        translation_key="carbon_intensity",
         unique_id="co2intensity",
         # No unit, it's extracted from response.
     ),
     CO2SensorEntityDescription(
         key="fossilFuelPercentage",
-        name="Grid fossil fuel percentage",
+        translation_key="fossil_fuel_percentage",
         native_unit_of_measurement=PERCENTAGE,
     ),
 )
diff --git a/homeassistant/components/co2signal/strings.json b/homeassistant/components/co2signal/strings.json
index 2fe5b79c907..05ea76f3179 100644
--- a/homeassistant/components/co2signal/strings.json
+++ b/homeassistant/components/co2signal/strings.json
@@ -30,5 +30,11 @@
       "unknown": "[%key:common::config_flow::error::unknown%]",
       "api_ratelimit": "API Ratelimit exceeded"
     }
+  },
+  "entity": {
+    "sensor": {
+      "carbon_intensity": { "name": "CO2 intensity" },
+      "fossil_fuel_percentage": { "name": "Grid fossil fuel percentage" }
+    }
   }
 }