TextNormalizer.java

 public String normalize(String word) {
      
      if (word == null || word.trim().isEmpty())
         return word;

      word = word.replaceAll("[ÂÀÁÄÃ]", "A");
      word = word.replaceAll("[âãàáä]", "a");
      word = word.replaceAll("[ÊÈÉË]", "E");
      word = word.replaceAll("[êèéë]", "e");
      word = word.replaceAll("ÎÍÌÏ", "I");
      word = word.replaceAll("îíìï", "i");
      word = word.replaceAll("[ÔÕÒÓÖ]", "O");
      word = word.replaceAll("[ôõòóö]", "o");
      word = word.replaceAll("[ÛÙÚÜ]", "U");
      word = word.replaceAll("[ûúùü]", "u");
      word = word.replaceAll("Ç", "C");
      word = word.replaceAll("ç", "c");
      word = word.replaceAll("[ýÿ]", "y");
      word = word.replaceAll("Ý", "Y");
      word = word.replaceAll("ñ", "n");
      word = word.replaceAll("Ñ", "N");
      word = word.replaceAll("['<>\\|/]", "");
      
      return word;

   }