AWS::Kendra::DataSource does not support LanguageCode

[JimOjpn]

There is no way to select a LanguageCode when building a custom Kendra DataSource. This causes the default language to default to "en". To change it requires either use of a CLI call or use of the console. This is an unexpected result.

I suggest the addition of LanguageCode in the Properties:

  KendraCustomDataSource:
    Type: AWS::Kendra::DataSource
    Properties:
      LanguageCode: "ja"
      Description: Custom data source for Box and other sources ingestion
      IndexId: !GetAtt KendraIndex.Id
      Name: "custom-data-source"
      Type: CUSTOM