Github user burakkose commented on the pull request:

    https://github.com/apache/spark/pull/11871#issuecomment-201069222
  
    @mengxr, Alright then, these are my plans.
    
    I am going to merge `StopWords` with `StopWordsRemover`(delete 
readStopWords), and we will read stopwords list from `loadStopWords` in object 
`StopWordsRemover`. So If users want to load stopwords directly, they will do 
that.
    
    `val stopWords = StopWordsRemover.loadStopWords("english").toSet`
    
    But I have a question about `language` param. If we don't keep the param, 
how should they do this?
    
    ```scala
    val remover = new StopWordsRemover()
          .setInputCol("raw")
          .setOutputCol("filtered")
          .setLanguage("danish")
    ```
    Should we force to do that?
    
    ```scala
     val stopWords = StopWordsRemover.loadStopWords("danish").toSet ++ 
Set("python", "scala")
        val remover = new StopWordsRemover()
          .setInputCol("raw")
          .setOutputCol("filtered")
          .setStopWords(stopWords.toArray)
    ```



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