diff --git a/packages/fx-core/resource/package.nls.json b/packages/fx-core/resource/package.nls.json
index 72d329fb5a..b3726570bb 100644
--- a/packages/fx-core/resource/package.nls.json
+++ b/packages/fx-core/resource/package.nls.json
@@ -486,6 +486,9 @@
   "core.common.NoServerInformation": "No server information is found in the OpenAPI description document.",
   "core.common.RemoteRefNotSupported": "Remote reference is not supported: %s.",
   "core.common.MissingOperationId": "Missing operationIds: %s.",
+  "core.common.UrlProtocolNotSupported": "Server url is incorrect: protocol %s is not supported, use https protocol.",
+  "core.common.RelativeServerUrlNotSupported": "Server url is incorrect: relative server url is not supported.",
+  "core.common.ErrorFetchApiSpec": "Your OpenAPI description document should be accessible without authentication. If not, download and use a local copy.",
   "core.common.NoSupportedApi": "No supported API found in the OpenAPI document.\nFor more information visit: \"https://aka.ms/build-api-based-message-extension\". \nReasons for API incompatibility are listed below:\n%s",
   "core.common.NoSupportedApiCopilot": "No supported API is found in the OpenAPI description document. \nReasons for API incompatibility are listed below:\n%s",
   "core.common.invalidReason.AuthTypeIsNotSupported": "authorization type is not supported",
@@ -510,25 +513,25 @@
   "core.common.ErrorFetchApiSpec": "Your OpenAPI description document should be accessible without authentication, otherwise download and start from a local copy.",
   "core.common.SendingApiRequest": "Sending API request: %s. Request body: %s",
   "core.common.ReceiveApiResponse": "Received API response: %s.",
-  "core.importAddin.label": "Import an Existing Outlook Add-ins",
-  "core.importAddin.detail": "Upgrade an Add-ins project to the latest app manifest and project structure",
-  "core.importOfficeAddin.label": "Import an Existing Office Add-ins",
-  "core.officeContentAddin.label": "Content Add-in",
+  "core.importAddin.label": "Import Existing Outlook Add-ins",
+  "core.importAddin.detail": "Upgrade Add-ins project to the latest app manifest and project structure",
+  "core.importOfficeAddin.label": "Import Existing Office Add-ins",
+  "core.officeContentAddin.label": "Content Add-ins",
   "core.officeContentAddin.detail": "Create new objects for Excel or PowerPoint",
   "core.newTaskpaneAddin.label": "Taskpane",
   "core.newTaskpaneAddin.detail": "Customize the Ribbon with a button and embed content in the Taskpane",
   "core.summary.actionDescription": "Action %s%s",
   "core.summary.lifecycleDescription": "Lifecycle stage: %s(%s step(s) in total). The following actions will be executed: %s",
-  "core.summary.lifecycleNotExecuted": "%s Lifecycle stage %s was not executed.",
-  "core.summary.lifecycleSucceeded": "%s Lifecycle stage %s was executed successfully.",
-  "core.summary.lifecycleFailed": "%s Lifecycle stage %s failed.",
-  "core.summary.actionNotExecuted": "%s was not executed.",
-  "core.summary.actionFailed": "%s failed.",
-  "core.summary.actionSucceeded": "%s was executed successfully.",
+  "core.summary.lifecycleNotExecuted": "%s Lifecycle stage %s not executed.",
+  "core.summary.lifecycleSucceeded": "%s Lifecycle stage %s executed successfully.",
+  "core.summary.lifecycleFailed": "%s Lifecycle stage %s didn't complete successfully.",
+  "core.summary.actionNotExecuted": "%s wasn't executed.",
+  "core.summary.actionFailed": "%s didn't complete successfully.",
+  "core.summary.actionSucceeded": "%s executed successfully.",
   "core.summary.createdEnvFile": "Environment file was created at",
-  "core.copilot.addAPI.success": "%s have(has) been successfully added to %s",
-  "core.copilot.addAPI.InjectAPIKeyActionFailed": "Inject API key action to teamsapp.yaml file unsuccessful, make sure the file contains teamsApp/create action in provision section.",
-  "core.copilot.addAPI.InjectOAuthActionFailed": "Inject OAuth action to teamsapp.yaml file unsuccessful, make sure the file contains teamsApp/create action in provision section.",
+  "core.copilot.addAPI.success": "%s successfully added to %s",
+  "core.copilot.addAPI.InjectAPIKeyActionFailed": "Unable to inject API key action to teamsapp.yaml file. Make sure the file contains teamsApp/create action in provision section.",
+  "core.copilot.addAPI.InjectOAuthActionFailed": "Unable to inject OAuth action to teamsapp.yaml file. Make sure the file contains teamsApp/create action in provision section.",
   "ui.select.LoadingOptionsPlaceholder": "Loading options ...",
   "ui.select.LoadingDefaultPlaceholder": "Loading default value ...",
   "error.aad.manifest.NameIsMissing": "name is missing\n",
@@ -536,8 +539,8 @@
   "error.aad.manifest.RequiredResourceAccessIsMissing": "requiredResourceAccess is missing\n",
   "error.aad.manifest.Oauth2PermissionsIsMissing": "oauth2Permissions is missing\n",
   "error.aad.manifest.PreAuthorizedApplicationsIsMissing": "preAuthorizedApplications is missing\n",
-  "error.aad.manifest.ResourceAppIdIsMissing": "Some item(s) in requiredResourceAccess misses resourceAppId property.",
-  "error.aad.manifest.ResourceAccessIdIsMissing": "Some item(s) in resourceAccess misses id property.",
+  "error.aad.manifest.ResourceAppIdIsMissing": "Some requiredResourceAccess item(s) are missing the resourceAppId property.",
+  "error.aad.manifest.ResourceAccessIdIsMissing": "Some resourceAccess item(s) are missing id property.",
   "error.aad.manifest.ResourceAccessShouldBeArray": "resourceAccess should be an array.",
   "error.aad.manifest.RequiredResourceAccessShouldBeArray": "requiredResourceAccess should be an array.",
   "error.aad.manifest.AccessTokenAcceptedVersionIs1": "accessTokenAcceptedVersion is 1\n",
diff --git a/packages/fx-core/tests/component/driver/aad/aadAppClient.test.ts b/packages/fx-core/tests/component/driver/aad/aadAppClient.test.ts
index 9cde0568c3..df2c299d49 100644
--- a/packages/fx-core/tests/component/driver/aad/aadAppClient.test.ts
+++ b/packages/fx-core/tests/component/driver/aad/aadAppClient.test.ts
@@ -519,7 +519,7 @@ describe("AadAppClient", async () => {
           expect(err.source).equals("AadAppClient");
           expect(err.name).equals("HostNameNotOnVerifiedDomain");
           expect(err.message).equals(
-            "Unable to set identifierUri because the value is not on verified domain: Mocked error message"
+            "Unable to set identifierUri as the value is not on verified domain: Mocked error message"
           );
           expect(err.helpLink).equals("https://aka.ms/teamsfx-multi-tenant");
         }
diff --git a/packages/fx-core/tests/component/driver/aad/aadManifestHelper.test.ts b/packages/fx-core/tests/component/driver/aad/aadManifestHelper.test.ts
index 239754fea9..a6991bf19c 100644
--- a/packages/fx-core/tests/component/driver/aad/aadManifestHelper.test.ts
+++ b/packages/fx-core/tests/component/driver/aad/aadManifestHelper.test.ts
@@ -172,7 +172,7 @@ describe("Microsoft Entra manifest helper Test", () => {
       .expect(() => {
         AadManifestHelper.processRequiredResourceAccessInManifest(manifestWithInvalidSting);
       })
-      .to.throw("Some item(s) in requiredResourceAccess misses resourceAppId property.");
+      .to.throw("Some requiredResourceAccess item(s) are missing the resourceAppId property.");
   });
 
   it("processRequiredResourceAccessInManifest with no resourceAccess id", async () => {
@@ -193,7 +193,7 @@ describe("Microsoft Entra manifest helper Test", () => {
       .expect(() => {
         AadManifestHelper.processRequiredResourceAccessInManifest(manifestWithInvalidSting);
       })
-      .to.throw("Some item(s) in resourceAccess misses id property.");
+      .to.throw("Some resourceAccess item(s) are missing id property.");
   });
 
   it("processRequiredResourceAccessInManifest with no requiredResourceAccess", async () => {