Fix for #17761. By adding the missing resource string for the Feature Interpolation Strings to VB.

src/Compilers/VisualBasic/Portable/Errors/Errors.vb

@@ -2017,5 +2017,6 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
         FEATURE_Tuples
         FEATURE_LeadingDigitSeparator
         FEATURE_PrivateProtected
+        FEATURE_InterpolatedStrings
     End Enum
 End Namespace

src/Compilers/VisualBasic/Portable/Parser/Parser.vb

@@ -6165,14 +6165,7 @@ checkNullable:
                 Return node
             End If
 
-            If feature = Feature.InterpolatedStrings Then
-                ' Bug: It is too late in the release cycle to update localized strings.  As a short term measure we will output 
-                ' an unlocalized string and fix this to be localized in the next release.
-                Dim requiredVersion = New VisualBasicRequiredLanguageVersion(feature.GetLanguageVersion())
-                Return ReportSyntaxError(node, ERRID.ERR_LanguageVersion, languageVersion.GetErrorName(), "interpolated strings", requiredVersion)
-            Else
-                Return ReportFeatureUnavailable(feature, node, languageVersion)
-            End If
+            Return ReportFeatureUnavailable(feature, node, languageVersion)
         End Function
 
         Private Shared Function ReportFeatureUnavailable(Of TNode As VisualBasicSyntaxNode)(feature As Feature, node As TNode, languageVersion As LanguageVersion) As TNode

src/Compilers/VisualBasic/Portable/Parser/ParserFeature.vb

@@ -152,6 +152,8 @@ Namespace Microsoft.CodeAnalysis.VisualBasic.Syntax.InternalSyntax
                     Return ERRID.FEATURE_LeadingDigitSeparator
                 Case Feature.PrivateProtected
                     Return ERRID.FEATURE_PrivateProtected
+                Case Feature.InterpolatedStrings
+                    Return ERRID.FEATURE_InterpolatedStrings
                 Case Else
                     Throw ExceptionUtilities.UnexpectedValue(feature)
             End Select

src/Compilers/VisualBasic/Portable/VBResources.Designer.vb

@@ -12072,6 +12072,15 @@ Namespace Microsoft.CodeAnalysis.VisualBasic
             End Get
         End Property
         
+        '''<summary>
+        '''  Looks up a localized string similar to interpolated strings.
+        '''</summary>
+        Friend ReadOnly Property FEATURE_InterpolatedStrings() As String
+            Get
+                Return ResourceManager.GetString("FEATURE_InterpolatedStrings", resourceCulture)
+            End Get
+        End Property
+        
         '''<summary>
         '''  Looks up a localized string similar to iterators.
         '''</summary>

src/Compilers/VisualBasic/Portable/VBResources.resx

@@ -5530,4 +5530,7 @@
   <data name="ICompoundAssignmentOperationIsNotVisualBasicCompoundAssignment" xml:space="preserve">
     <value>{0} is not a valid Visual Basic compound assignment operation</value>
   </data>
+  <data name="FEATURE_InterpolatedStrings" xml:space="preserve">
+    <value>interpolated strings</value>
+  </data>
 </root>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.cs.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.de.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.es.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.fr.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.it.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.ja.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.ko.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.pl.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.pt-BR.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.ru.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.tr.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.zh-Hans.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file

src/Compilers/VisualBasic/Portable/xlf/VBResources.zh-Hant.xlf

@@ -9081,6 +9081,11 @@
         <target state="new">Invalid hash algorithm name: '{0}'</target>
         <note />
       </trans-unit>
+      <trans-unit id="FEATURE_InterpolatedStrings">
+        <source>interpolated strings</source>
+        <target state="new">interpolated strings</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file