diff --git a/CHANGELOG.md b/CHANGELOG.md
index 24009aa239..0aa6a88987 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,6 +26,8 @@
   - Added en-US localization ([issue #625](https://github.com/PowerShell/SqlServerDsc/issues/625)).
 - Changes to SqlServerPermission
   - Added en-US localization ([issue #619](https://github.com/PowerShell/SqlServerDsc/issues/619)).
+- Changes to SqlServerEndpointState
+  - Added en-US localization ([issue #613](https://github.com/PowerShell/SqlServerDsc/issues/613)).
 
 ## 12.4.0.0
 
diff --git a/DSCResources/MSFT_SqlServerEndpointState/MSFT_SqlServerEndpointState.psm1 b/DSCResources/MSFT_SqlServerEndpointState/MSFT_SqlServerEndpointState.psm1
index 35df748942..32a509e95d 100644
--- a/DSCResources/MSFT_SqlServerEndpointState/MSFT_SqlServerEndpointState.psm1
+++ b/DSCResources/MSFT_SqlServerEndpointState/MSFT_SqlServerEndpointState.psm1
@@ -7,6 +7,8 @@ Import-Module -Name (Join-Path -Path $script:localizationModulePath -ChildPath '
 $script:resourceHelperModulePath = Join-Path -Path $script:modulesFolderPath -ChildPath 'DscResource.Common'
 Import-Module -Name (Join-Path -Path $script:resourceHelperModulePath -ChildPath 'DscResource.Common.psm1')
 
+$script:localizedData = Get-LocalizedData -ResourceName 'MSFT_SqlServerEndpointState'
+
 <#
     .SYNOPSIS
         Returns the current state of an endpoint.
@@ -39,7 +41,9 @@ function Get-TargetResource
         $Name
     )
 
-    New-VerboseMessage -Message "Getting state of endpoint $Name"
+    Write-Verbose -Message (
+        $script:localizedData.GetEndpointState -f $Name, $InstanceName
+    )
 
     try
     {
@@ -49,15 +53,21 @@ function Get-TargetResource
         if ($null -ne $endpointObject)
         {
             $currentState = $endpointObject.EndpointState
+
+            Write-Verbose -Message (
+                $script:localizedData.CurrentState -f $currentState
+            )
         }
         else
         {
-            throw New-TerminatingError -ErrorType EndpointNotFound -FormatArgs @($Name) -ErrorCategory ObjectNotFound
+            $errorMessage = $script:localizedData.EndpointNotFound -f $Name
+            New-ObjectNotFoundException -Message $errorMessage
         }
     }
     catch
     {
-        throw New-TerminatingError -ErrorType EndpointErrorVerifyExist -FormatArgs @($Name) -ErrorCategory ObjectNotFound -InnerException $_.Exception
+        $errorMessage = $script:localizedData.EndpointErrorVerifyExist -f $Name
+        New-ObjectNotFoundException -Message $errorMessage -ErrorRecord $_
     }
 
     return @{
@@ -107,6 +117,10 @@ function Set-TargetResource
         $State = 'Started'
     )
 
+    Write-Verbose -Message (
+        $script:localizedData.SetEndpointState -f $Name, $InstanceName
+    )
+
     $parameters = @{
         InstanceName = [System.String] $InstanceName
         ServerName   = [System.String] $ServerName
@@ -118,7 +132,9 @@ function Set-TargetResource
     {
         if ($getTargetResourceResult.State -ne $State)
         {
-            New-VerboseMessage -Message ('Changing state of endpoint ''{0}''' -f $Name)
+            Write-Verbose -Message (
+                $script:localizedData.ChangeState -f $State
+            )
 
             $sqlServerObject = Connect-SQL -ServerName $ServerName -InstanceName $InstanceName
 
@@ -129,16 +145,19 @@ function Set-TargetResource
                 State       = $State
             }
 
-            Set-SqlHADREndpoint @setEndpointParams -ErrorAction Stop | Out-Null
+            Set-SqlHADREndpoint @setEndpointParams -ErrorAction 'Stop' | Out-Null
         }
         else
         {
-            New-VerboseMessage -Message ('Endpoint ''{0}'' state is already correct.' -f $Name)
+            Write-Verbose -Message (
+                $script:localizedData.InDesiredState -f $Name, $State
+            )
         }
     }
     else
     {
-        throw New-TerminatingError -ErrorType UnexpectedErrorFromGet -ErrorCategory InvalidResult
+        $errorMessage = $script:localizedData.UnexpectedErrorFromGet
+        New-InvalidResultException -Message $errorMessage
     }
 }
 
@@ -182,27 +201,40 @@ function Test-TargetResource
         $State = 'Started'
     )
 
+    Write-Verbose -Message (
+        $script:localizedData.TestingConfiguration -f $Name, $InstanceName
+    )
+
     $parameters = @{
         InstanceName = $InstanceName
         ServerName   = $ServerName
         Name         = $Name
     }
 
-    New-VerboseMessage -Message "Testing state $State on endpoint '$Name'"
-
     $getTargetResourceResult = Get-TargetResource @parameters
     if ($null -ne $getTargetResourceResult)
     {
-        $result = $false
-
         if ($getTargetResourceResult.State -eq $State)
         {
+            Write-Verbose -Message (
+                $script:localizedData.InDesiredState -f $Name, $getTargetResourceResult.State
+            )
+
             $result = $true
         }
+        else
+        {
+            Write-Verbose -Message (
+                $script:localizedData.NotInDesiredState -f $Name, $getTargetResourceResult.State, $State
+            )
+
+            $result = $false
+        }
     }
     else
     {
-        throw New-TerminatingError -ErrorType UnexpectedErrorFromGet -ErrorCategory InvalidResult
+        $errorMessage = $script:localizedData.UnexpectedErrorFromGet
+        New-InvalidResultException -Message $errorMessage
     }
 
     return $result
diff --git a/DSCResources/MSFT_SqlServerEndpointState/en-US/MSFT_SqlServerEndpointState.strings.psd1 b/DSCResources/MSFT_SqlServerEndpointState/en-US/MSFT_SqlServerEndpointState.strings.psd1
new file mode 100644
index 0000000000..1b3882f5ce
--- /dev/null
+++ b/DSCResources/MSFT_SqlServerEndpointState/en-US/MSFT_SqlServerEndpointState.strings.psd1
@@ -0,0 +1,12 @@
+ConvertFrom-StringData @'
+    GetEndpointState = Getting state of the endpoint with the name '{0}' for the instance '{1}'.
+    EndpointNotFound = The endpoint with the name '{0}' does not exist.
+    EndpointErrorVerifyExist = Unexpected result when trying to verify existence of the endpoint with the name '{0}'.
+    UnexpectedErrorFromGet = Got unexpected result from Get-TargetResource. No change is made.
+    CurrentState = The current state of the endpoint is '{0}'.
+    SetEndpointState = Changing the state of the endpoint with the name '{0}' for the instance '{1}'.
+    ChangeState = Changing the state of endpoint to '{0}'.
+    InDesiredState = The endpoint '{0}' is the desired state, the state is '{1}'.
+    NotInDesiredState = The endpoint '{0}' has the state '{1}', but expected the state to be '{2}'.
+    TestingConfiguration = Determines the state of the endpoint with the name '{0}' for the instance '{1}'.
+'@
diff --git a/Tests/Unit/MSFT_SqlServerEndpointState.Tests.ps1 b/Tests/Unit/MSFT_SqlServerEndpointState.Tests.ps1
index 7f90c553ef..cb006d4e95 100644
--- a/Tests/Unit/MSFT_SqlServerEndpointState.Tests.ps1
+++ b/Tests/Unit/MSFT_SqlServerEndpointState.Tests.ps1
@@ -143,7 +143,7 @@ try
 
                 Context 'When endpoint is missing' {
                     It 'Should throw the correct error message' {
-                        { Get-TargetResource @testParameters } | Should -Throw 'Unexpected result when trying to verify existence of endpoint ''DefaultEndpointMirror''. InnerException: Endpoint ''DefaultEndpointMirror'' does not exist'
+                        { Get-TargetResource @testParameters } | Should -Throw ($script:localizedData.EndpointErrorVerifyExist -f $testParameters.Name)
 
                         Assert-MockCalled Connect-SQL -Exactly -Times 1 -Scope It
                     }
@@ -267,7 +267,7 @@ try
                             return $null
                         } -Verifiable
 
-                        { Test-TargetResource @testParameters } | Should -Throw 'Got unexpected result from Get-TargetResource. No change is made.'
+                        { Test-TargetResource @testParameters } | Should -Throw $script:localizedData.UnexpectedErrorFromGet
 
                         Assert-MockCalled Connect-SQL -Exactly -Times 0 -Scope It
                     }
@@ -342,7 +342,7 @@ try
                             return $null
                         } -Verifiable
 
-                        { Set-TargetResource @testParameters } | Should -Throw 'Got unexpected result from Get-TargetResource. No change is made.'
+                        { Set-TargetResource @testParameters } | Should -Throw $script:localizedData.UnexpectedErrorFromGet
 
                         Assert-MockCalled Connect-SQL -Exactly -Times 0 -Scope It
                     }