Creating multi-language MSI package with MSBuild

int-msi.targets

<Target Name="AfterBuild">
  <!-- Set inputs & outputs for CreateLanguageTransforms. -->
  <ItemGroup>
    <MsiForTransform
      Include="$(OutputDir)\%(CultureGroup.OutputFolder)$(OutputFullName)"
      Exclude="$(OutputDir)\en-US_\$(OutputFullName)"
    />
    <Transform
      Include="$(OutputDir)\%(CultureGroup.OutputFolder)%(CultureGroup.Identity).mst"
      Exclude="$(OutputDir)\en-US_\%(CultureGroup.Identity).mst"
    />
  </ItemGroup>
</Target> 

<Target
  Name="CreateLanguageTransforms"
  AfterTargets="AfterBuild"
  Condition="'$(OutputType)' == 'Package'"
  Inputs="@(MsiForTransform)"
  Outputs="@(Transform)">

  <!-- Create *.mst files. -->
  <Torch
    ToolPath="$(WixToolPath)"
    NoLogo="$(NoLogo)"
    AdditionalOptions="-pedantic -wx"
    PreserveUnmodifiedContent="true"
    TransformValidationType="language"
    BaselineFile="$(OutputDir)\en-US_\$(OutputFullName)"
    UpdateFile="@(MsiForTransform)"
    OutputFile="@(Transform)">
    <Output TaskParameter="OutputFile" ItemName="LanguageTransform"/>
  </Torch>
</Target>

<Target Name="EmbedLanguageTransforms"
  AfterTargets="CreateLanguageTransforms"
  Condition="'$(OutputType)' == 'Package'"
  Inputs="@(LanguageTransform);$(IntMsiAbsPath);$(MSBuildThisFileFullPath)"
  Outputs="$(IntermediateOutputPath)EmbedLanguageTransforms.dep">
 
  <!-- Create LangId list from LangIds. -->
  <ItemGroup>
    <LangId Include="$(LangIds.Split(','))" Exclude="1033"/>
    <Culture Include="@(CultureGroup)" Exclude="en-US_,en-US">
      <LangId>%(LangId.Identity)</LangId>
    </Culture>
  </ItemGroup>

  <!-- Copy "en-US" MSI pacakge. -->
  <Copy
    SourceFiles="$(OutputDir)\en-US_\$(OutputFullName)"
    DestinationFolder="$(OutputDir)\int"
    SkipUnchangedFiles='true'
  />
  <!-- Embed language transforms & update package languages. -->
  <Exec Condition="@(Culture) != ''"
    Command="
      CScript $(MsiToolsPath)\wisubstg.vbs //Nologo //E:VBScript $(OutputDir)\int\$(OutputFullName) @(LanguageTransform) %(Culture.LangId)
      CScript $(MsiToolsPath)\wilangid.vbs //Nologo //E:VBScript $(OutputDir)\int\$(OutputFullName) Package 1033,@(LangId)
    "
  />

  <Touch
    Files="$(IntermediateOutputPath)EmbedLanguageTransforms.dep"
    AlwaysCreate="True"
  />
</Target>

<!-- Sign international MSI. -->
<Target Name="SignIntMsi" AfterTargets="EmbedLanguageTransforms"
  Condition="'$(OutputType)' == 'Package' AND '$(Configuration)' == 'Release'"
  Inputs="$(IntMsiAbsPath);$(MSBuildThisFileFullPath)"
  Outputs="$(IntermediateOutputPath)SignIntMsi.dep">
  <Exec Command="&quot;$(SignToolPath)&quot; sign /t $(TimestampServerUrl) /sha1 $(CertificateThumbprint) /sm /d &quot;$(MsiFileDescription)&quot; /du $(VendorUrl) $(IntMsiAbsPath)"/>
  <Touch Files="$(IntermediateOutputPath)SignIntMsi.dep" AlwaysCreate="True"/>
</Target>