diff --git a/homeassistant/components/mqtt/strings.json b/homeassistant/components/mqtt/strings.json
index d2d18af6e60cbb5fc180db273eac58dfaa281ce5..8c3db8e5b61eb09712a5664d8038d4d30320d873 100644
--- a/homeassistant/components/mqtt/strings.json
+++ b/homeassistant/components/mqtt/strings.json
@@ -20,10 +20,10 @@
       }
     },
     "abort": {
-      "single_instance_allowed": "Only a single configuration of MQTT is allowed."
+      "single_instance_allowed": "[%key:common::config_flow::abort::single_instance_allowed%]"
     },
     "error": {
-      "cannot_connect": "Unable to connect to the broker."
+      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]"
     }
   },
   "device_automation": {
@@ -77,7 +77,7 @@
       }
     },
     "error": {
-      "cannot_connect": "Unable to connect to the broker.",
+      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
       "bad_birth": "Invalid birth topic.",
       "bad_will": "Invalid will topic."
     }