diff --git a/homeassistant/components/velbus/config_flow.py b/homeassistant/components/velbus/config_flow.py
index 361b5a01175..7d392ab37c5 100644
--- a/homeassistant/components/velbus/config_flow.py
+++ b/homeassistant/components/velbus/config_flow.py
@@ -37,7 +37,7 @@ class VelbusConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
         try:
             controller = velbus.Controller(prt)
         except Exception:  # pylint: disable=broad-except
-            self._errors[CONF_PORT] = "connection_failed"
+            self._errors[CONF_PORT] = "cannot_connect"
             return False
         controller.stop()
         return True
@@ -58,7 +58,7 @@ class VelbusConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
                 if self._test_connection(prt):
                     return self._create_device(name, prt)
             else:
-                self._errors[CONF_PORT] = "port_exists"
+                self._errors[CONF_PORT] = "already_configured"
         else:
             user_input = {}
             user_input[CONF_NAME] = ""
@@ -82,5 +82,5 @@ class VelbusConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
         if self._prt_in_configuration_exists(prt):
             # if the velbus import is already in the config
             # we should not proceed the import
-            return self.async_abort(reason="port_exists")
+            return self.async_abort(reason="already_configured")
         return await self.async_step_user(user_input)
diff --git a/homeassistant/components/velbus/strings.json b/homeassistant/components/velbus/strings.json
index d5f9d4e7ccf..c2defd782f4 100644
--- a/homeassistant/components/velbus/strings.json
+++ b/homeassistant/components/velbus/strings.json
@@ -10,9 +10,11 @@
       }
     },
     "error": {
-      "port_exists": "This port is already configured",
-      "connection_failed": "The velbus connection failed"
+      "already_configured": "[%key:common::config_flow::abort::already_configured_device%]",
+      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]"
     },
-    "abort": { "port_exists": "This port is already configured" }
+    "abort": {
+        "already_configured": "[%key:common::config_flow::abort::already_configured_device%]"
+    }
   }
 }
diff --git a/tests/components/velbus/test_config_flow.py b/tests/components/velbus/test_config_flow.py
index 3bccacc0a94..0a7bc4489c7 100644
--- a/tests/components/velbus/test_config_flow.py
+++ b/tests/components/velbus/test_config_flow.py
@@ -65,13 +65,13 @@ async def test_user_fail(hass, controller_assert):
         {CONF_NAME: "Velbus Test Serial", CONF_PORT: PORT_SERIAL}
     )
     assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
-    assert result["errors"] == {CONF_PORT: "connection_failed"}
+    assert result["errors"] == {CONF_PORT: "cannot_connect"}
 
     result = await flow.async_step_user(
         {CONF_NAME: "Velbus Test TCP", CONF_PORT: PORT_TCP}
     )
     assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
-    assert result["errors"] == {CONF_PORT: "connection_failed"}
+    assert result["errors"] == {CONF_PORT: "cannot_connect"}
 
 
 async def test_import(hass, controller):
@@ -94,10 +94,10 @@ async def test_abort_if_already_setup(hass):
         {CONF_PORT: PORT_TCP, CONF_NAME: "velbus import test"}
     )
     assert result["type"] == data_entry_flow.RESULT_TYPE_ABORT
-    assert result["reason"] == "port_exists"
+    assert result["reason"] == "already_configured"
 
     result = await flow.async_step_user(
         {CONF_PORT: PORT_TCP, CONF_NAME: "velbus import test"}
     )
     assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
-    assert result["errors"] == {"port": "port_exists"}
+    assert result["errors"] == {"port": "already_configured"}