diff --git a/homeassistant/components/tellduslive/config_flow.py b/homeassistant/components/tellduslive/config_flow.py
index 36bc89d115a..ae8a9d1a690 100644
--- a/homeassistant/components/tellduslive/config_flow.py
+++ b/homeassistant/components/tellduslive/config_flow.py
@@ -91,7 +91,7 @@ class FlowHandler(config_entries.ConfigFlow):
                         KEY_SESSION: session,
                     },
                 )
-            errors["base"] = "auth_error"
+            errors["base"] = "invalid_auth"
 
         try:
             with async_timeout.timeout(10):
diff --git a/homeassistant/components/tellduslive/strings.json b/homeassistant/components/tellduslive/strings.json
index aabf00bc1b2..8d1c2c1acaf 100644
--- a/homeassistant/components/tellduslive/strings.json
+++ b/homeassistant/components/tellduslive/strings.json
@@ -1,13 +1,13 @@
 {
   "config": {
     "abort": {
-      "already_configured": "TelldusLive is already configured",
+      "already_configured": "[%key:common::config_flow::abort::already_configured_service%]",
       "authorize_url_fail": "Unknown error generating an authorize url.",
-      "authorize_url_timeout": "Timeout generating authorize url.",
-      "unknown": "Unknown error occurred"
+      "authorize_url_timeout": "[%key:common::config_flow::abort::oauth2_authorize_url_timeout%]",
+      "unknown": "[%key:common::config_flow::error::unknown%]"
     },
     "error": {
-      "auth_error": "Authentication error, please try again"
+      "invalid_auth": "[%key:common::config_flow::error::invalid_auth%]"
     },
     "step": {
       "auth": {
diff --git a/tests/components/tellduslive/test_config_flow.py b/tests/components/tellduslive/test_config_flow.py
index a8f188fffc7..66476c8735d 100644
--- a/tests/components/tellduslive/test_config_flow.py
+++ b/tests/components/tellduslive/test_config_flow.py
@@ -201,7 +201,7 @@ async def test_wrong_auth_flow_implementation(hass, mock_tellduslive):
     result = await flow.async_step_auth("")
     assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
     assert result["step_id"] == "auth"
-    assert result["errors"]["base"] == "auth_error"
+    assert result["errors"]["base"] == "invalid_auth"
 
 
 async def test_not_pick_host_if_only_one(hass, mock_tellduslive):