diff --git a/homeassistant/components/somfy/config_flow.py b/homeassistant/components/somfy/config_flow.py
index 2d143fbd196..80fc2192d8e 100644
--- a/homeassistant/components/somfy/config_flow.py
+++ b/homeassistant/components/somfy/config_flow.py
@@ -24,6 +24,6 @@ class SomfyFlowHandler(config_entry_oauth2_flow.AbstractOAuth2FlowHandler):
     async def async_step_user(self, user_input=None):
         """Handle a flow start."""
         if self.hass.config_entries.async_entries(DOMAIN):
-            return self.async_abort(reason="already_setup")
+            return self.async_abort(reason="single_instance_allowed")
 
         return await super().async_step_user(user_input)
diff --git a/homeassistant/components/somfy/strings.json b/homeassistant/components/somfy/strings.json
index d1fa921bb8e..2f54456091c 100644
--- a/homeassistant/components/somfy/strings.json
+++ b/homeassistant/components/somfy/strings.json
@@ -4,11 +4,13 @@
       "pick_implementation": { "title": "Pick Authentication Method" }
     },
     "abort": {
-      "already_setup": "You can only configure one Somfy account.",
+      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "authorize_url_timeout": "Timeout generating authorize url.",
       "missing_configuration": "The Somfy component is not configured. Please follow the documentation.",
       "no_url_available": "[%key:common::config_flow::abort::oauth2_no_url_available%]"
     },
-    "create_entry": { "default": "Successfully authenticated with Somfy." }
+    "create_entry": {
+      "default": "[%key:common::config_flow::create_entry::authenticated%]"
+    }
   }
 }
diff --git a/tests/components/somfy/test_config_flow.py b/tests/components/somfy/test_config_flow.py
index b1df938b3b1..89b4fbe9b13 100644
--- a/tests/components/somfy/test_config_flow.py
+++ b/tests/components/somfy/test_config_flow.py
@@ -49,7 +49,7 @@ async def test_abort_if_existing_entry(hass):
 
     result = await flow.async_step_user()
     assert result["type"] == data_entry_flow.RESULT_TYPE_ABORT
-    assert result["reason"] == "already_setup"
+    assert result["reason"] == "single_instance_allowed"
 
 
 async def test_full_flow(hass, aiohttp_client, aioclient_mock, current_request):