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我试图重构代码,我遇到了这段代码.你能否在其中建议任何重构,请说明你使用的折射.

private void setUpBag(String language){
    if(language.equals("english")){
        /* add letters with English distribution to bag */
    }
    else if(language.equals("french")){
        /* add letters with French distribution to bag */
    }
    else if(language.equals("russian")){
        /* add letters with Russian distribution to bag */
    }
    else{
        throw new IllegalArgumentException("Unknown language");
    }
}