diff --git a/homeassistant/components/asuswrt/config_flow.py b/homeassistant/components/asuswrt/config_flow.py
index e1b34cca15b..ec5cccb9a71 100644
--- a/homeassistant/components/asuswrt/config_flow.py
+++ b/homeassistant/components/asuswrt/config_flow.py
@@ -149,10 +149,10 @@ class AsusWrtFlowHandler(ConfigFlow, domain=DOMAIN):
     ) -> FlowResult:
         """Handle a flow initiated by the user."""
 
-        # if exist one entry without unique ID, we abort config flow
+        # if there's one entry without unique ID, we abort config flow
         for unique_id in self._async_current_ids():
             if unique_id is None:
-                return self.async_abort(reason="not_unique_id_exist")
+                return self.async_abort(reason="no_unique_id")
 
         if user_input is None:
             return self._show_setup_form(user_input)
@@ -188,7 +188,7 @@ class AsusWrtFlowHandler(ConfigFlow, domain=DOMAIN):
                     return self.async_abort(reason="invalid_unique_id")
                 else:
                     _LOGGER.warning(
-                        "This device do not provide a valid Unique ID."
+                        "This device does not provide a valid Unique ID."
                         " Configuration of multiple instance will not be possible"
                     )
 
diff --git a/homeassistant/components/asuswrt/strings.json b/homeassistant/components/asuswrt/strings.json
index 73887fcc4af..bd0c706e74a 100644
--- a/homeassistant/components/asuswrt/strings.json
+++ b/homeassistant/components/asuswrt/strings.json
@@ -26,7 +26,7 @@
     },
     "abort": {
       "invalid_unique_id": "Impossible to determine a valid unique id for the device",
-      "not_unique_id_exist": "A device without a valid unique id is already configured. Configuration of multiple instance is not possible"
+      "no_unique_id": "A device without a valid unique id is already configured. Configuration of multiple instance is not possible"
     }
   },
   "options": {
diff --git a/homeassistant/components/asuswrt/translations/en.json b/homeassistant/components/asuswrt/translations/en.json
index 4d4ea4d0a30..f93eae80e6d 100644
--- a/homeassistant/components/asuswrt/translations/en.json
+++ b/homeassistant/components/asuswrt/translations/en.json
@@ -2,8 +2,7 @@
     "config": {
         "abort": {
             "invalid_unique_id": "Impossible to determine a valid unique id for the device",
-            "not_unique_id_exist": "A device without a valid unique id is already configured. Configuration of multiple instance is not possible",
-            "single_instance_allowed": "Already configured. Only a single configuration possible."
+            "no_unique_id": "A device without a valid unique id is already configured. Configuration of multiple instance is not possible"
         },
         "error": {
             "cannot_connect": "Failed to connect",
@@ -44,4 +43,4 @@
             }
         }
     }
-}
+}
\ No newline at end of file
diff --git a/tests/components/asuswrt/test_config_flow.py b/tests/components/asuswrt/test_config_flow.py
index 09c484ff69d..8475bd48f9a 100644
--- a/tests/components/asuswrt/test_config_flow.py
+++ b/tests/components/asuswrt/test_config_flow.py
@@ -169,7 +169,7 @@ async def test_abort_if_not_unique_id_setup(hass):
         data=CONFIG_DATA,
     )
     assert result["type"] == data_entry_flow.RESULT_TYPE_ABORT
-    assert result["reason"] == "not_unique_id_exist"
+    assert result["reason"] == "no_unique_id"
 
 
 @pytest.mark.usefixtures("connect")