diff --git a/homeassistant/components/nest/config_flow.py b/homeassistant/components/nest/config_flow.py
index 8f7a0909f33..df903b11981 100644
--- a/homeassistant/components/nest/config_flow.py
+++ b/homeassistant/components/nest/config_flow.py
@@ -66,10 +66,10 @@ class NestFlowHandler(config_entries.ConfigFlow):
         flows = self.hass.data.get(DATA_FLOW_IMPL, {})
 
         if self.hass.config_entries.async_entries(DOMAIN):
-            return self.async_abort(reason="already_setup")
+            return self.async_abort(reason="single_instance_allowed")
 
         if not flows:
-            return self.async_abort(reason="no_flows")
+            return self.async_abort(reason="missing_configuration")
 
         if len(flows) == 1:
             self.flow_impl = list(flows)[0]
@@ -106,7 +106,7 @@ class NestFlowHandler(config_entries.ConfigFlow):
             except asyncio.TimeoutError:
                 errors["code"] = "timeout"
             except CodeInvalid:
-                errors["code"] = "invalid_code"
+                errors["code"] = "invalid_pin"
             except NestAuthError:
                 errors["code"] = "unknown"
             except Exception:  # pylint: disable=broad-except
@@ -132,7 +132,7 @@ class NestFlowHandler(config_entries.ConfigFlow):
     async def async_step_import(self, info):
         """Import existing auth from Nest."""
         if self.hass.config_entries.async_entries(DOMAIN):
-            return self.async_abort(reason="already_setup")
+            return self.async_abort(reason="single_instance_allowed")
 
         config_path = info["nest_conf_path"]
 
diff --git a/homeassistant/components/nest/strings.json b/homeassistant/components/nest/strings.json
index 015df164533..84e7885a363 100644
--- a/homeassistant/components/nest/strings.json
+++ b/homeassistant/components/nest/strings.json
@@ -3,25 +3,25 @@
     "step": {
       "init": {
         "title": "Authentication Provider",
-        "description": "Pick via which authentication provider you want to authenticate with Nest.",
+        "description": "[%key:common::config_flow::title::oauth2_pick_implementation%]",
         "data": { "flow_impl": "Provider" }
       },
       "link": {
         "title": "Link Nest Account",
         "description": "To link your Nest account, [authorize your account]({url}).\n\nAfter authorization, copy-paste the provided pin code below.",
-        "data": { "code": "Pin code" }
+        "data": { "code": "[%key:common::config_flow::data::pin%]" }
       }
     },
     "error": {
       "timeout": "Timeout validating code",
-      "invalid_code": "Invalid code",
-      "unknown": "Unknown error validating code",
+      "invalid_pin": "Invalid [%key:common::config_flow::data::pin%]",
+      "unknown": "[%key:common::config_flow::error::unknown%]",
       "internal_error": "Internal error validating code"
     },
     "abort": {
-      "already_setup": "You can only configure a single Nest account.",
-      "no_flows": "You need to configure Nest before being able to authenticate with it. [Please read the instructions](https://www.home-assistant.io/components/nest/).",
-      "authorize_url_timeout": "Timeout generating authorize url.",
+      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
+      "missing_configuration": "[%key:common::config_flow::abort::oauth2_missing_configuration%]",
+      "authorize_url_timeout": "[%key:common::config_flow::abort::oauth2_authorize_url_timeout%]",
       "authorize_url_fail": "Unknown error generating an authorize url."
     }
   }
diff --git a/tests/components/nest/test_config_flow.py b/tests/components/nest/test_config_flow.py
index 6c0c0197a74..e0e93bf626a 100644
--- a/tests/components/nest/test_config_flow.py
+++ b/tests/components/nest/test_config_flow.py
@@ -17,10 +17,10 @@ async def test_abort_if_no_implementation_registered(hass):
     result = await flow.async_step_init()
 
     assert result["type"] == data_entry_flow.RESULT_TYPE_ABORT
-    assert result["reason"] == "no_flows"
+    assert result["reason"] == "missing_configuration"
 
 
-async def test_abort_if_already_setup(hass):
+async def test_abort_if_single_instance_allowed(hass):
     """Test we abort if Nest is already setup."""
     flow = config_flow.NestFlowHandler()
     flow.hass = hass
@@ -29,7 +29,7 @@ async def test_abort_if_already_setup(hass):
         result = await flow.async_step_init()
 
     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_implementation(hass):
@@ -140,7 +140,7 @@ async def test_verify_code_invalid(hass):
     result = await flow.async_step_link({"code": "123ABC"})
     assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
     assert result["step_id"] == "link"
-    assert result["errors"] == {"code": "invalid_code"}
+    assert result["errors"] == {"code": "invalid_pin"}
 
 
 async def test_verify_code_unknown_error(hass):