diff --git a/homeassistant/components/cielo_home/strings.json b/homeassistant/components/cielo_home/strings.json
index a7dba1479250..937550bcfadb 100644
--- a/homeassistant/components/cielo_home/strings.json
+++ b/homeassistant/components/cielo_home/strings.json
@@ -1,8 +1,7 @@
 {
   "config": {
     "abort": {
-      "already_configured": "[%key:common::config_flow::abort::already_configured_account%]",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
+      "already_configured": "[%key:common::config_flow::abort::already_configured_account%]"
     },
     "error": {
       "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
diff --git a/homeassistant/components/deako/strings.json b/homeassistant/components/deako/strings.json
index 088e85a726d2..edd1785d55ea 100644
--- a/homeassistant/components/deako/strings.json
+++ b/homeassistant/components/deako/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "confirm": {
         "description": "Please confirm setting up the Deako integration"
diff --git a/homeassistant/components/dialogflow/strings.json b/homeassistant/components/dialogflow/strings.json
index 74333f7690f7..c2fcc78bac0f 100644
--- a/homeassistant/components/dialogflow/strings.json
+++ b/homeassistant/components/dialogflow/strings.json
@@ -2,7 +2,6 @@
   "config": {
     "abort": {
       "reconfigure_successful": "**Reconfiguration was successful**\n\nGo to the [webhook service of Dialogflow]({dialogflow_url}) and update the webhook with following settings:\n\n- URL: `{webhook_url}`\n- Method: POST\n- Content Type: application/json\n\nSee [the documentation]({docs_url}) for further details.",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "webhook_not_internet_accessible": "[%key:common::config_flow::abort::webhook_not_internet_accessible%]"
     },
     "create_entry": {
diff --git a/homeassistant/components/downloader/strings.json b/homeassistant/components/downloader/strings.json
index 0b34e6e0ba45..da8816a052f3 100644
--- a/homeassistant/components/downloader/strings.json
+++ b/homeassistant/components/downloader/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "error": {
       "directory_does_not_exist": "The directory could not be reached. Please check your settings."
     },
diff --git a/homeassistant/components/dsmr_reader/strings.json b/homeassistant/components/dsmr_reader/strings.json
index caeca6052c34..ca091eefdc12 100644
--- a/homeassistant/components/dsmr_reader/strings.json
+++ b/homeassistant/components/dsmr_reader/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "confirm": {
         "description": "Make sure to configure the 'split topic' data sources in DSMR Reader."
diff --git a/homeassistant/components/ecobee/strings.json b/homeassistant/components/ecobee/strings.json
index b8310f9b2557..50f8ead0ad48 100644
--- a/homeassistant/components/ecobee/strings.json
+++ b/homeassistant/components/ecobee/strings.json
@@ -1,8 +1,7 @@
 {
   "config": {
     "abort": {
-      "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
+      "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]"
     },
     "error": {
       "invalid_auth": "[%key:common::config_flow::error::invalid_auth%]",
diff --git a/homeassistant/components/escea/strings.json b/homeassistant/components/escea/strings.json
index 83e561d467d9..6f6892035a0c 100644
--- a/homeassistant/components/escea/strings.json
+++ b/homeassistant/components/escea/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "confirm": {
         "description": "Do you want to set up an Escea fireplace?"
diff --git a/homeassistant/components/essent/strings.json b/homeassistant/components/essent/strings.json
index 1b6f692a697c..ed5dac8607ac 100644
--- a/homeassistant/components/essent/strings.json
+++ b/homeassistant/components/essent/strings.json
@@ -3,7 +3,6 @@
     "abort": {
       "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
       "invalid_data": "Received invalid data from Essent",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "unknown": "[%key:common::config_flow::error::unknown%]"
     },
     "step": {
diff --git a/homeassistant/components/fastdotcom/strings.json b/homeassistant/components/fastdotcom/strings.json
index 1efed4a1b621..72514458b844 100644
--- a/homeassistant/components/fastdotcom/strings.json
+++ b/homeassistant/components/fastdotcom/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "user": {
         "description": "Do you want to start the setup? The initial setup will take about 30-40 seconds."
diff --git a/homeassistant/components/fjaraskupan/strings.json b/homeassistant/components/fjaraskupan/strings.json
index 70343f151df1..c008f3410bac 100644
--- a/homeassistant/components/fjaraskupan/strings.json
+++ b/homeassistant/components/fjaraskupan/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "confirm": {
         "description": "Do you want to set up Fjäråskupan?"
diff --git a/homeassistant/components/generic/strings.json b/homeassistant/components/generic/strings.json
index 58a460e36560..9d182ac9eb52 100644
--- a/homeassistant/components/generic/strings.json
+++ b/homeassistant/components/generic/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "error": {
       "already_exists": "A camera with these URL settings already exists.",
       "invalid_still_image": "URL did not return a valid still image",
diff --git a/homeassistant/components/geofency/strings.json b/homeassistant/components/geofency/strings.json
index 90b1a8779428..e14e6cec4a4e 100644
--- a/homeassistant/components/geofency/strings.json
+++ b/homeassistant/components/geofency/strings.json
@@ -2,7 +2,6 @@
   "config": {
     "abort": {
       "reconfigure_successful": "**Reconfiguration was successful**\n\nGo to the webhook feature in Geofency and update the webhook with the following settings:\n\n- URL: `{webhook_url}`\n- Method: POST\n\nSee [the documentation]({docs_url}) for further details.",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "webhook_not_internet_accessible": "[%key:common::config_flow::abort::webhook_not_internet_accessible%]"
     },
     "create_entry": {
diff --git a/homeassistant/components/govee_light_local/strings.json b/homeassistant/components/govee_light_local/strings.json
index 18873d294a51..a852fdc0171e 100644
--- a/homeassistant/components/govee_light_local/strings.json
+++ b/homeassistant/components/govee_light_local/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "confirm": {
         "description": "[%key:common::config_flow::description::confirm_setup%]"
diff --git a/homeassistant/components/gpslogger/strings.json b/homeassistant/components/gpslogger/strings.json
index 972fd4952b6a..28952b9525ef 100644
--- a/homeassistant/components/gpslogger/strings.json
+++ b/homeassistant/components/gpslogger/strings.json
@@ -2,7 +2,6 @@
   "config": {
     "abort": {
       "reconfigure_successful": "**Reconfiguration was successful**\n\nGo to the webhook feature in GPSLogger and update the webhook with the following settings:\n\n- URL: `{webhook_url}`\n- Method: POST\n\nSee [the documentation]({docs_url}) for further details.",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "webhook_not_internet_accessible": "[%key:common::config_flow::abort::webhook_not_internet_accessible%]"
     },
     "create_entry": {
diff --git a/homeassistant/components/gree/strings.json b/homeassistant/components/gree/strings.json
index 1a68177c6bb9..136923694748 100644
--- a/homeassistant/components/gree/strings.json
+++ b/homeassistant/components/gree/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "confirm": {
         "description": "[%key:common::config_flow::description::confirm_setup%]"
diff --git a/homeassistant/components/hisense_aehw4a1/strings.json b/homeassistant/components/hisense_aehw4a1/strings.json
index c29a0fb6ce68..2172bf8061cb 100644
--- a/homeassistant/components/hisense_aehw4a1/strings.json
+++ b/homeassistant/components/hisense_aehw4a1/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "confirm": {
         "description": "Do you want to set up Hisense AEH-W4A1?"
diff --git a/homeassistant/components/ifttt/strings.json b/homeassistant/components/ifttt/strings.json
index fc1ff7b05342..4030480c9235 100644
--- a/homeassistant/components/ifttt/strings.json
+++ b/homeassistant/components/ifttt/strings.json
@@ -2,7 +2,6 @@
   "config": {
     "abort": {
       "reconfigure_successful": "**Reconfiguration was successful**\n\nGo to the \"Make a web request\" action from the [IFTTT webhook applet]({applet_url}) and update the webhook with the following settings:\n\n- URL: `{webhook_url}`\n- Method: POST\n- Content Type: application/json\n\nSee [the documentation]({docs_url}) on how to configure automations to handle incoming data.",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "webhook_not_internet_accessible": "[%key:common::config_flow::abort::webhook_not_internet_accessible%]"
     },
     "create_entry": {
diff --git a/homeassistant/components/ios/strings.json b/homeassistant/components/ios/strings.json
index 1fb7ac74aae6..5e86ffe943fa 100644
--- a/homeassistant/components/ios/strings.json
+++ b/homeassistant/components/ios/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "confirm": {
         "description": "[%key:common::config_flow::description::confirm_setup%]"
diff --git a/homeassistant/components/laundrify/strings.json b/homeassistant/components/laundrify/strings.json
index 88c9752dc59e..d1b273b151fc 100644
--- a/homeassistant/components/laundrify/strings.json
+++ b/homeassistant/components/laundrify/strings.json
@@ -1,8 +1,7 @@
 {
   "config": {
     "abort": {
-      "already_configured": "[%key:common::config_flow::abort::already_configured_account%]",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
+      "already_configured": "[%key:common::config_flow::abort::already_configured_account%]"
     },
     "error": {
       "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
diff --git a/homeassistant/components/locative/strings.json b/homeassistant/components/locative/strings.json
index e4dcac05d187..a6d9caa78c07 100644
--- a/homeassistant/components/locative/strings.json
+++ b/homeassistant/components/locative/strings.json
@@ -2,7 +2,6 @@
   "config": {
     "abort": {
       "reconfigure_successful": "**Reconfiguration was successful**\n\nGo to webhooks in the Locative app and update webhook with the following settings:\n\n- URL: `{webhook_url}`\n- Method: POST\n\nSee [the documentation]({docs_url}) for further details.",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "webhook_not_internet_accessible": "[%key:common::config_flow::abort::webhook_not_internet_accessible%]"
     },
     "create_entry": {
diff --git a/homeassistant/components/london_underground/strings.json b/homeassistant/components/london_underground/strings.json
index 27f5213fab02..593f02dad0b0 100644
--- a/homeassistant/components/london_underground/strings.json
+++ b/homeassistant/components/london_underground/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "error": {
       "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
       "timeout_connect": "[%key:common::config_flow::error::timeout_connect%]",
diff --git a/homeassistant/components/mailgun/strings.json b/homeassistant/components/mailgun/strings.json
index d2763f78f68b..eabde9948a3a 100644
--- a/homeassistant/components/mailgun/strings.json
+++ b/homeassistant/components/mailgun/strings.json
@@ -2,7 +2,6 @@
   "config": {
     "abort": {
       "reconfigure_successful": "**Reconfiguration was successful**\n\nGo to [webhooks in Mailgun]({mailgun_url}) and update the webhook with the following settings:\n\n- URL: `{webhook_url}`\n- Method: POST\n- Content Type: application/json\n\nSee [the documentation]({docs_url}) on how to configure automations to handle incoming data.",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "webhook_not_internet_accessible": "[%key:common::config_flow::abort::webhook_not_internet_accessible%]"
     },
     "create_entry": {
diff --git a/homeassistant/components/miele/strings.json b/homeassistant/components/miele/strings.json
index f5693e4e66c8..5070eb3c4653 100644
--- a/homeassistant/components/miele/strings.json
+++ b/homeassistant/components/miele/strings.json
@@ -9,8 +9,7 @@
       "missing_configuration": "[%key:common::config_flow::abort::oauth2_missing_configuration%]",
       "no_devices_found": "[%key:common::config_flow::abort::no_devices_found%]",
       "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
-      "reconfigure_successful": "[%key:common::config_flow::abort::reconfigure_successful%]",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
+      "reconfigure_successful": "[%key:common::config_flow::abort::reconfigure_successful%]"
     },
     "create_entry": {
       "default": "[%key:common::config_flow::create_entry::authenticated%]"
diff --git a/homeassistant/components/mqtt/strings.json b/homeassistant/components/mqtt/strings.json
index fa64f81a0936..214054e8f0dd 100644
--- a/homeassistant/components/mqtt/strings.json
+++ b/homeassistant/components/mqtt/strings.json
@@ -7,8 +7,7 @@
       "addon_start_failed": "Failed to start the {addon} app.",
       "already_configured": "[%key:common::config_flow::abort::already_configured_service%]",
       "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
-      "reconfigure_successful": "[%key:common::config_flow::abort::reconfigure_successful%]",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
+      "reconfigure_successful": "[%key:common::config_flow::abort::reconfigure_successful%]"
     },
     "error": {
       "bad_birth": "Invalid birth topic",
diff --git a/homeassistant/components/netatmo/strings.json b/homeassistant/components/netatmo/strings.json
index 2cf34d7e1ee0..94d64f46caa4 100644
--- a/homeassistant/components/netatmo/strings.json
+++ b/homeassistant/components/netatmo/strings.json
@@ -2,8 +2,7 @@
   "config": {
     "abort": {
       "missing_configuration": "[%key:common::config_flow::abort::oauth2_missing_configuration%]",
-      "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
+      "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]"
     },
     "create_entry": {
       "default": "[%key:common::config_flow::create_entry::authenticated%]"
diff --git a/homeassistant/components/omie/strings.json b/homeassistant/components/omie/strings.json
index 1646d7a856b8..10cef445348f 100644
--- a/homeassistant/components/omie/strings.json
+++ b/homeassistant/components/omie/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "error": {
       "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]"
     },
diff --git a/homeassistant/components/otbr/strings.json b/homeassistant/components/otbr/strings.json
index 60ce2e6ec912..c03d42a6c334 100644
--- a/homeassistant/components/otbr/strings.json
+++ b/homeassistant/components/otbr/strings.json
@@ -2,7 +2,6 @@
   "config": {
     "abort": {
       "already_configured": "The Thread border router is already configured",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "unknown": "[%key:common::config_flow::error::unknown%]"
     },
     "error": {
diff --git a/homeassistant/components/pglab/strings.json b/homeassistant/components/pglab/strings.json
index 0ff5c7633e15..63c63d76304d 100644
--- a/homeassistant/components/pglab/strings.json
+++ b/homeassistant/components/pglab/strings.json
@@ -2,8 +2,7 @@
   "config": {
     "abort": {
       "mqtt_not_configured": "Home Assistant MQTT integration not configured.",
-      "mqtt_not_connected": "Home Assistant MQTT integration not connected to MQTT broker.",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
+      "mqtt_not_connected": "Home Assistant MQTT integration not connected to MQTT broker."
     },
     "step": {
       "confirm_from_mqtt": {
diff --git a/homeassistant/components/plaato/strings.json b/homeassistant/components/plaato/strings.json
index 7a696286c5bb..e3167d888041 100644
--- a/homeassistant/components/plaato/strings.json
+++ b/homeassistant/components/plaato/strings.json
@@ -2,7 +2,6 @@
   "config": {
     "abort": {
       "already_configured": "[%key:common::config_flow::abort::already_configured_account%]",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "webhook_not_internet_accessible": "[%key:common::config_flow::abort::webhook_not_internet_accessible%]"
     },
     "create_entry": {
diff --git a/homeassistant/components/refoss/strings.json b/homeassistant/components/refoss/strings.json
index 3eaf68565423..e7e08f713524 100644
--- a/homeassistant/components/refoss/strings.json
+++ b/homeassistant/components/refoss/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "confirm": {
         "description": "[%key:common::config_flow::description::confirm_setup%]"
diff --git a/homeassistant/components/sentry/config_flow.py b/homeassistant/components/sentry/config_flow.py
index b131edd2e5e3..e284866c066a 100644
--- a/homeassistant/components/sentry/config_flow.py
+++ b/homeassistant/components/sentry/config_flow.py
@@ -12,7 +12,7 @@ from homeassistant.config_entries import (
     ConfigFlowResult,
     OptionsFlow,
 )
-from homeassistant.core import callback
+from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN, callback
 
 from .const import (
     CONF_DSN,
@@ -56,7 +56,10 @@ class SentryConfigFlow(ConfigFlow, domain=DOMAIN):
     ) -> ConfigFlowResult:
         """Handle a user config flow."""
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         errors = {}
         if user_input is not None:
diff --git a/homeassistant/components/sentry/strings.json b/homeassistant/components/sentry/strings.json
index d15d053524d7..006fef82dfdd 100644
--- a/homeassistant/components/sentry/strings.json
+++ b/homeassistant/components/sentry/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "error": {
       "bad_dsn": "Invalid DSN",
       "unknown": "[%key:common::config_flow::error::unknown%]"
diff --git a/homeassistant/components/slimproto/config_flow.py b/homeassistant/components/slimproto/config_flow.py
index 99291b8a5c73..f1710cb05096 100644
--- a/homeassistant/components/slimproto/config_flow.py
+++ b/homeassistant/components/slimproto/config_flow.py
@@ -3,6 +3,7 @@
 from typing import Any, override
 
 from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
+from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN
 
 from .const import DEFAULT_NAME, DOMAIN
 
@@ -18,7 +19,10 @@ class SlimProtoConfigFlow(ConfigFlow, domain=DOMAIN):
     ) -> ConfigFlowResult:
         """Handle the initial step."""
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         # we have nothing to configure so simply create the entry
         return self.async_create_entry(title=DEFAULT_NAME, data={})
diff --git a/homeassistant/components/slimproto/strings.json b/homeassistant/components/slimproto/strings.json
index 151035f1efe4..2e07d4bc64e9 100644
--- a/homeassistant/components/slimproto/strings.json
+++ b/homeassistant/components/slimproto/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "user": {}
     }
diff --git a/homeassistant/components/sonos/strings.json b/homeassistant/components/sonos/strings.json
index b17818ddc3cb..b9270998ae8f 100644
--- a/homeassistant/components/sonos/strings.json
+++ b/homeassistant/components/sonos/strings.json
@@ -2,8 +2,7 @@
   "config": {
     "abort": {
       "not_ipv4_address": "No IPv4 address in SSDP discovery information",
-      "not_sonos_device": "Discovered device is not a Sonos device",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
+      "not_sonos_device": "Discovered device is not a Sonos device"
     },
     "step": {
       "confirm": {
diff --git a/homeassistant/components/speedtestdotnet/config_flow.py b/homeassistant/components/speedtestdotnet/config_flow.py
index 220642bd50a4..0b32db20828a 100644
--- a/homeassistant/components/speedtestdotnet/config_flow.py
+++ b/homeassistant/components/speedtestdotnet/config_flow.py
@@ -9,7 +9,7 @@ from homeassistant.config_entries import (
     ConfigFlowResult,
     OptionsFlowWithReload,
 )
-from homeassistant.core import callback
+from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN, callback
 
 from .const import (
     CONF_SERVER_ID,
@@ -41,7 +41,10 @@ class SpeedTestFlowHandler(ConfigFlow, domain=DOMAIN):
     ) -> ConfigFlowResult:
         """Handle a flow initialized by the user."""
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         if user_input is None:
             return self.async_show_form(step_id="user")
diff --git a/homeassistant/components/speedtestdotnet/strings.json b/homeassistant/components/speedtestdotnet/strings.json
index 244549ad1796..f288dd3d6c73 100644
--- a/homeassistant/components/speedtestdotnet/strings.json
+++ b/homeassistant/components/speedtestdotnet/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "user": {
         "description": "[%key:common::config_flow::description::confirm_setup%]"
diff --git a/homeassistant/components/splunk/strings.json b/homeassistant/components/splunk/strings.json
index cd5068317f44..b4e82c9ab018 100644
--- a/homeassistant/components/splunk/strings.json
+++ b/homeassistant/components/splunk/strings.json
@@ -7,7 +7,6 @@
       "invalid_config": "The YAML configuration is invalid and cannot be imported. Please check your configuration.yaml file.",
       "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
       "reconfigure_successful": "[%key:common::config_flow::abort::reconfigure_successful%]",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "unknown": "[%key:common::config_flow::error::unknown%]"
     },
     "error": {
diff --git a/homeassistant/components/switcher_kis/strings.json b/homeassistant/components/switcher_kis/strings.json
index 32a00fc442a2..d632db07e8e1 100644
--- a/homeassistant/components/switcher_kis/strings.json
+++ b/homeassistant/components/switcher_kis/strings.json
@@ -2,8 +2,7 @@
   "config": {
     "abort": {
       "no_devices_found": "[%key:common::config_flow::abort::no_devices_found%]",
-      "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
+      "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]"
     },
     "error": {
       "invalid_auth": "[%key:common::config_flow::error::invalid_auth%]"
diff --git a/homeassistant/components/systemmonitor/strings.json b/homeassistant/components/systemmonitor/strings.json
index 97f8f16af84a..bcca38d7a4f9 100644
--- a/homeassistant/components/systemmonitor/strings.json
+++ b/homeassistant/components/systemmonitor/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::already_configured_service%]"
-    },
     "step": {
       "user": {
         "description": "Select **Submit** for initial setup. On the created config entry, select configure to add sensors for selected processes"
diff --git a/homeassistant/components/tasmota/config_flow.py b/homeassistant/components/tasmota/config_flow.py
index 7ccf7d88c1d2..68f2d6570ba3 100644
--- a/homeassistant/components/tasmota/config_flow.py
+++ b/homeassistant/components/tasmota/config_flow.py
@@ -6,6 +6,7 @@ import voluptuous as vol
 
 from homeassistant.components.mqtt import valid_subscribe_topic
 from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
+from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN
 from homeassistant.helpers.service_info.mqtt import MqttServiceInfo
 
 from .const import CONF_DISCOVERY_PREFIX, DEFAULT_PREFIX, DOMAIN
@@ -26,7 +27,10 @@ class FlowHandler(ConfigFlow, domain=DOMAIN):
     ) -> ConfigFlowResult:
         """Handle a flow initialized by MQTT discovery."""
         if self._async_in_progress() or self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         await self.async_set_unique_id(DOMAIN)
 
@@ -50,7 +54,10 @@ class FlowHandler(ConfigFlow, domain=DOMAIN):
     ) -> ConfigFlowResult:
         """Handle a flow initialized by the user."""
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         return await self.async_step_config()
 
diff --git a/homeassistant/components/tasmota/strings.json b/homeassistant/components/tasmota/strings.json
index 033a161a1b57..b96b1bddffeb 100644
--- a/homeassistant/components/tasmota/strings.json
+++ b/homeassistant/components/tasmota/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "error": {
       "invalid_discovery_topic": "Invalid discovery topic prefix."
     },
diff --git a/homeassistant/components/todoist/config_flow.py b/homeassistant/components/todoist/config_flow.py
index cb0150c24c2d..c8432a64d37d 100644
--- a/homeassistant/components/todoist/config_flow.py
+++ b/homeassistant/components/todoist/config_flow.py
@@ -10,6 +10,7 @@ import voluptuous as vol
 
 from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
 from homeassistant.const import CONF_TOKEN
+from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN
 
 from .const import DOMAIN
 
@@ -35,7 +36,10 @@ class TodoistConfigFlow(ConfigFlow, domain=DOMAIN):
     ) -> ConfigFlowResult:
         """Handle the initial step."""
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         errors: dict[str, str] = {}
         if user_input is not None:
diff --git a/homeassistant/components/todoist/strings.json b/homeassistant/components/todoist/strings.json
index fb46f24efe7a..52dc1413041d 100644
--- a/homeassistant/components/todoist/strings.json
+++ b/homeassistant/components/todoist/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "create_entry": {
       "default": "[%key:common::config_flow::create_entry::authenticated%]"
     },
diff --git a/homeassistant/components/traccar/strings.json b/homeassistant/components/traccar/strings.json
index fcf1e729aa8d..b15361ae396e 100644
--- a/homeassistant/components/traccar/strings.json
+++ b/homeassistant/components/traccar/strings.json
@@ -2,7 +2,6 @@
   "config": {
     "abort": {
       "reconfigure_successful": "**Reconfiguration was successful**\n\nGo to webhooks in the Traccar Client and update the webhook with the following URL: `{webhook_url}`\n\nSee [the documentation]({docs_url}) for further details.",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "webhook_not_internet_accessible": "[%key:common::config_flow::abort::webhook_not_internet_accessible%]"
     },
     "create_entry": {
diff --git a/homeassistant/components/twilio/strings.json b/homeassistant/components/twilio/strings.json
index bb3a726fb5e6..7986b4d7a9e0 100644
--- a/homeassistant/components/twilio/strings.json
+++ b/homeassistant/components/twilio/strings.json
@@ -2,7 +2,6 @@
   "config": {
     "abort": {
       "reconfigure_successful": "**Reconfiguration was successful**\n\nGo to [webhooks in Twilio]({twilio_url}) and update the webhook with the following settings:\n\n- URL: `{webhook_url}`\n- Method: POST\n- Content Type: application/x-www-form-urlencoded\n\nSee [the documentation]({docs_url}) on how to configure automations to handle incoming data.",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "webhook_not_internet_accessible": "[%key:common::config_flow::abort::webhook_not_internet_accessible%]"
     },
     "create_entry": {
diff --git a/homeassistant/components/vicare/config_flow.py b/homeassistant/components/vicare/config_flow.py
index 5203c2e82c3e..b4868b3c1615 100644
--- a/homeassistant/components/vicare/config_flow.py
+++ b/homeassistant/components/vicare/config_flow.py
@@ -5,6 +5,7 @@ import logging
 from typing import Any, override
 
 from homeassistant.config_entries import SOURCE_REAUTH, ConfigFlowResult
+from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN
 from homeassistant.helpers import config_entry_oauth2_flow
 from homeassistant.helpers.device_registry import format_mac
 from homeassistant.helpers.service_info.dhcp import DhcpServiceInfo
@@ -35,7 +36,10 @@ class ViCareFlowHandler(
     ) -> ConfigFlowResult:
         """Handle a flow initiated by the user."""
         if self.source != SOURCE_REAUTH and self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         return await super().async_step_user(user_input)
 
@@ -81,6 +85,9 @@ class ViCareFlowHandler(
         self._abort_if_unique_id_configured()
 
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         return await self.async_step_user()
diff --git a/homeassistant/components/vicare/strings.json b/homeassistant/components/vicare/strings.json
index a528e2ca33b6..ad723aed14f2 100644
--- a/homeassistant/components/vicare/strings.json
+++ b/homeassistant/components/vicare/strings.json
@@ -7,7 +7,6 @@
       "already_configured": "[%key:common::config_flow::abort::already_configured_device%]",
       "missing_configuration": "[%key:common::config_flow::abort::oauth2_missing_configuration%]",
       "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "unknown": "[%key:common::config_flow::error::unknown%]"
     },
     "create_entry": {
diff --git a/homeassistant/components/voip/config_flow.py b/homeassistant/components/voip/config_flow.py
index daa916d3d4c1..915fe26147b7 100644
--- a/homeassistant/components/voip/config_flow.py
+++ b/homeassistant/components/voip/config_flow.py
@@ -11,7 +11,7 @@ from homeassistant.config_entries import (
     ConfigFlowResult,
     OptionsFlow,
 )
-from homeassistant.core import callback
+from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN, callback
 from homeassistant.helpers import config_validation as cv
 
 from .const import CONF_SIP_PORT, CONF_SIP_USER, DOMAIN
@@ -28,7 +28,10 @@ class VoIPConfigFlow(ConfigFlow, domain=DOMAIN):
     ) -> ConfigFlowResult:
         """Handle the initial step."""
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         if user_input is None:
             return self.async_show_form(
diff --git a/homeassistant/components/voip/strings.json b/homeassistant/components/voip/strings.json
index d0502190b4be..9f5f15d78137 100644
--- a/homeassistant/components/voip/strings.json
+++ b/homeassistant/components/voip/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "user": {
         "description": "Receive Voice over IP calls to interact with Assist."
diff --git a/homeassistant/components/weatherflow/config_flow.py b/homeassistant/components/weatherflow/config_flow.py
index 1c11ae4b933d..e7c878fc397e 100644
--- a/homeassistant/components/weatherflow/config_flow.py
+++ b/homeassistant/components/weatherflow/config_flow.py
@@ -9,7 +9,7 @@ from pyweatherflowudp.client import EVENT_DEVICE_DISCOVERED, WeatherFlowListener
 from pyweatherflowudp.errors import AddressInUseError, EndpointError, ListenerError
 
 from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
-from homeassistant.core import callback
+from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN, callback
 
 from .const import (
     DOMAIN,
@@ -55,7 +55,10 @@ class WeatherFlowConfigFlow(ConfigFlow, domain=DOMAIN):
         # will pick up all devices on the network and we don't want to
         # create multiple entries.
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
         found = False
         errors = {}
         try:
diff --git a/homeassistant/components/weatherflow/strings.json b/homeassistant/components/weatherflow/strings.json
index eb5621317094..2f0f18eca3b0 100644
--- a/homeassistant/components/weatherflow/strings.json
+++ b/homeassistant/components/weatherflow/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "error": {
       "address_in_use": "Unable to open local UDP port 50222.",
       "cannot_connect": "UDP discovery error.",
diff --git a/homeassistant/components/wemo/strings.json b/homeassistant/components/wemo/strings.json
index 874f4633c214..eaefaa709a32 100644
--- a/homeassistant/components/wemo/strings.json
+++ b/homeassistant/components/wemo/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "confirm": {
         "description": "Do you want to set up Wemo?"
diff --git a/homeassistant/components/zerproc/strings.json b/homeassistant/components/zerproc/strings.json
index 7b2ae512458d..0a9cf0004bc9 100644
--- a/homeassistant/components/zerproc/strings.json
+++ b/homeassistant/components/zerproc/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "confirm": {
         "description": "[%key:common::config_flow::description::confirm_setup%]"
diff --git a/homeassistant/components/zha/config_flow.py b/homeassistant/components/zha/config_flow.py
index ec7e147bf51f..a434c502a3cc 100644
--- a/homeassistant/components/zha/config_flow.py
+++ b/homeassistant/components/zha/config_flow.py
@@ -31,7 +31,7 @@ from homeassistant.config_entries import (
     OptionsFlow,
 )
 from homeassistant.const import CONF_NAME
-from homeassistant.core import HomeAssistant, callback
+from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN, HomeAssistant, callback
 from homeassistant.data_entry_flow import AbortFlow
 from homeassistant.exceptions import HomeAssistantError
 from homeassistant.helpers.selector import (
@@ -828,7 +828,10 @@ class ZhaConfigFlowHandler(BaseZhaFlow, ConfigFlow, domain=DOMAIN):
 
                 # Abort discovery if the device path is already configured
                 if path is not None and path in current_device_paths:
-                    return self.async_abort(reason="single_instance_allowed")
+                    return self.async_abort(
+                        reason="single_instance_allowed",
+                        translation_domain=HOMEASSISTANT_DOMAIN,
+                    )
 
         # Without confirmation, discovery can automatically progress into parts of the
         # config flow logic that interacts with hardware.
@@ -1032,7 +1035,10 @@ class ZhaConfigFlowHandler(BaseZhaFlow, ConfigFlow, domain=DOMAIN):
 
             return self.async_create_entry(title="", data=data)
         # This should never be reached
-        return self.async_abort(reason="single_instance_allowed")
+        return self.async_abort(
+            reason="single_instance_allowed",
+            translation_domain=HOMEASSISTANT_DOMAIN,
+        )
 
 
 class ZhaOptionsFlowHandler(BaseZhaFlow, OptionsFlow):
diff --git a/homeassistant/components/zha/strings.json b/homeassistant/components/zha/strings.json
index 50b5cc71802f..175e8a2b9cf9 100644
--- a/homeassistant/components/zha/strings.json
+++ b/homeassistant/components/zha/strings.json
@@ -8,7 +8,6 @@
       "invalid_zeroconf_data": "The coordinator has invalid Zeroconf service info and cannot be identified by ZHA",
       "not_zha_device": "This device is not a ZHA device",
       "reconfigure_successful": "ZHA has successfully migrated from your old adapter to the new one. Give your Zigbee network a few minutes to stabilize.\n\nIf you no longer need the old adapter, you can now unplug it.",
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]",
       "usb_probe_failed": "Failed to probe the USB device",
       "wrong_firmware_installed": "Your device is running the wrong firmware and cannot be used with ZHA until the correct firmware is installed. [A repair has been created]({repair_url}) with more information and instructions for how to fix this."
     },
diff --git a/homeassistant/components/zodiac/config_flow.py b/homeassistant/components/zodiac/config_flow.py
index b226b9d29664..81e839eeb403 100644
--- a/homeassistant/components/zodiac/config_flow.py
+++ b/homeassistant/components/zodiac/config_flow.py
@@ -3,6 +3,7 @@
 from typing import Any, override
 
 from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
+from homeassistant.core import DOMAIN as HOMEASSISTANT_DOMAIN
 
 from .const import DEFAULT_NAME, DOMAIN
 
@@ -18,7 +19,10 @@ class ZodiacConfigFlow(ConfigFlow, domain=DOMAIN):
     ) -> ConfigFlowResult:
         """Handle a flow initialized by the user."""
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         if user_input is not None:
             return self.async_create_entry(title=DEFAULT_NAME, data={})
diff --git a/homeassistant/components/zodiac/strings.json b/homeassistant/components/zodiac/strings.json
index 2c534cef9890..af971f3fe8b2 100644
--- a/homeassistant/components/zodiac/strings.json
+++ b/homeassistant/components/zodiac/strings.json
@@ -1,8 +1,5 @@
 {
   "config": {
-    "abort": {
-      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
-    },
     "step": {
       "user": {
         "description": "[%key:common::config_flow::description::confirm_setup%]"
diff --git a/homeassistant/helpers/config_entry_flow.py b/homeassistant/helpers/config_entry_flow.py
index c46188a32950..e6d195f68d40 100644
--- a/homeassistant/helpers/config_entry_flow.py
+++ b/homeassistant/helpers/config_entry_flow.py
@@ -47,7 +47,10 @@ class DiscoveryFlowHandler[_R: Awaitable[bool] | bool](config_entries.ConfigFlow
     ) -> config_entries.ConfigFlowResult:
         """Handle a flow initialized by the user."""
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         await self.async_set_unique_id(self._domain, raise_on_progress=False)
 
@@ -83,7 +86,10 @@ class DiscoveryFlowHandler[_R: Awaitable[bool] | bool](config_entries.ConfigFlow
                 self.hass.config_entries.flow.async_abort(flow["flow_id"])
 
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         return self.async_create_entry(title=self._title, data={})
 
@@ -93,7 +99,10 @@ class DiscoveryFlowHandler[_R: Awaitable[bool] | bool](config_entries.ConfigFlow
     ) -> config_entries.ConfigFlowResult:
         """Handle a flow initialized by discovery."""
         if self._async_in_progress() or self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         await self.async_set_unique_id(self._domain)
 
@@ -105,7 +114,10 @@ class DiscoveryFlowHandler[_R: Awaitable[bool] | bool](config_entries.ConfigFlow
     ) -> config_entries.ConfigFlowResult:
         """Handle a flow initialized by bluetooth discovery."""
         if self._async_in_progress() or self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         await self.async_set_unique_id(self._domain)
 
@@ -117,7 +129,10 @@ class DiscoveryFlowHandler[_R: Awaitable[bool] | bool](config_entries.ConfigFlow
     ) -> config_entries.ConfigFlowResult:
         """Handle a flow initialized by dhcp discovery."""
         if self._async_in_progress() or self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         await self.async_set_unique_id(self._domain)
 
@@ -129,7 +144,10 @@ class DiscoveryFlowHandler[_R: Awaitable[bool] | bool](config_entries.ConfigFlow
     ) -> config_entries.ConfigFlowResult:
         """Handle a flow initialized by Homekit discovery."""
         if self._async_in_progress() or self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         await self.async_set_unique_id(self._domain)
 
@@ -141,7 +159,10 @@ class DiscoveryFlowHandler[_R: Awaitable[bool] | bool](config_entries.ConfigFlow
     ) -> config_entries.ConfigFlowResult:
         """Handle a flow initialized by mqtt discovery."""
         if self._async_in_progress() or self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         await self.async_set_unique_id(self._domain)
 
@@ -153,7 +174,10 @@ class DiscoveryFlowHandler[_R: Awaitable[bool] | bool](config_entries.ConfigFlow
     ) -> config_entries.ConfigFlowResult:
         """Handle a flow initialized by Zeroconf discovery."""
         if self._async_in_progress() or self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         await self.async_set_unique_id(self._domain)
 
@@ -165,7 +189,10 @@ class DiscoveryFlowHandler[_R: Awaitable[bool] | bool](config_entries.ConfigFlow
     ) -> config_entries.ConfigFlowResult:
         """Handle a flow initialized by Ssdp discovery."""
         if self._async_in_progress() or self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         await self.async_set_unique_id(self._domain)
 
@@ -176,7 +203,10 @@ class DiscoveryFlowHandler[_R: Awaitable[bool] | bool](config_entries.ConfigFlow
     ) -> config_entries.ConfigFlowResult:
         """Handle a flow initialized by import."""
         if self._async_current_entries():
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         # Cancel other flows.
         in_progress = self._async_in_progress()
@@ -230,7 +260,10 @@ class WebhookFlowHandler(config_entries.ConfigFlow):
             and self._async_current_entries()
             and self.source != config_entries.SOURCE_RECONFIGURE
         ):
-            return self.async_abort(reason="single_instance_allowed")
+            return self.async_abort(
+                reason="single_instance_allowed",
+                translation_domain=HOMEASSISTANT_DOMAIN,
+            )
 
         if user_input is None:
             return self.async_show_form(
diff --git a/tests/helpers/test_config_entry_flow.py b/tests/helpers/test_config_entry_flow.py
index b03dcc0a487c..85c48b1d9cb5 100644
--- a/tests/helpers/test_config_entry_flow.py
+++ b/tests/helpers/test_config_entry_flow.py
@@ -77,6 +77,7 @@ async def test_single_entry_allowed(
 
     assert result["type"] is data_entry_flow.FlowResultType.ABORT
     assert result["reason"] == "single_instance_allowed"
+    assert result["translation_domain"] == HOMEASSISTANT_DOMAIN
 
 
 async def test_user_no_devices_found(
@@ -152,6 +153,7 @@ async def test_user_has_confirmation_async_discovery_flow(
     [
         config_entries.SOURCE_BLUETOOTH,
         config_entries.SOURCE_DISCOVERY,
+        config_entries.SOURCE_HOMEKIT,
         config_entries.SOURCE_MQTT,
         config_entries.SOURCE_SSDP,
         config_entries.SOURCE_ZEROCONF,
@@ -171,6 +173,23 @@ async def test_discovery_single_instance(
 
     assert result["type"] == data_entry_flow.FlowResultType.ABORT
     assert result["reason"] == "single_instance_allowed"
+    assert result["translation_domain"] == HOMEASSISTANT_DOMAIN
+
+
+async def test_discovery_confirm_single_instance(
+    hass: HomeAssistant, discovery_flow_conf: dict[str, bool]
+) -> None:
+    """Test confirming a discovery aborts once an entry exists."""
+    flow = config_entries.HANDLERS["test"]()
+    flow.hass = hass
+    flow.context = {"source": config_entries.SOURCE_DISCOVERY}
+
+    MockConfigEntry(domain="test").add_to_hass(hass)
+    result = await flow.async_step_confirm({})
+
+    assert result["type"] is data_entry_flow.FlowResultType.ABORT
+    assert result["reason"] == "single_instance_allowed"
+    assert result["translation_domain"] == HOMEASSISTANT_DOMAIN
 
 
 @pytest.mark.parametrize(
@@ -322,6 +341,8 @@ async def test_import_single_instance(
 
     result = await flow.async_step_import(None)
     assert result["type"] == data_entry_flow.FlowResultType.ABORT
+    assert result["reason"] == "single_instance_allowed"
+    assert result["translation_domain"] == HOMEASSISTANT_DOMAIN
 
 
 async def test_ignored_discoveries(
@@ -370,6 +391,7 @@ async def test_webhook_single_entry_allowed(
 
     assert result["type"] is data_entry_flow.FlowResultType.ABORT
     assert result["reason"] == "single_instance_allowed"
+    assert result["translation_domain"] == HOMEASSISTANT_DOMAIN
 
 
 async def test_webhook_multiple_entries_allowed(