title: Ukranian character changing to question mark when save from .xlsx to .txt
body: <p>I have received an <code>.xlsx</code> file with ukranian characters in one of the fields, but when i try to convert to <code>.csv</code> or <code>.txt</code> the ukranian characters are changing to question marks. Why is this happening?</p>
  
  <p><code>.xlsx</code>:</p>
  
  <pre><code>'UAH',  'Колодки тормозные дисковые, комплект' UNION ALL
  'UAH',  'Колодки тормозные' UNION ALL
  'UAH',  'Колодки тормозные дисковые, комплект' UNION ALL
  'UAH',  'Автозапчасть' UNION ALL
  'EUR',  'This Is Test' UNION ALL
  'EUR',  'This Is Test' UNION ALL
  'EUR',  'This Is Test' UNION ALL
  'USD',  'This Is Another Test' UNION ALL
  'USD',  'This Is Another Test' UNION ALL
  'USD',  'This Is Another Test'
  </code></pre>
  
  <p>when saved as <code>.csv</code> or <code>.txt</code></p>
  
  <pre><code>CURR    DESCC
  UAH         ??????? ????????? ????????, ????????
  UAH         ??????? ?????????
  UAH         ??????? ????????? ????????, ????????
  UAH         ????????????
  EUR         This Is Test
  EUR         This Is Test
  EUR         This Is Test
  USD         This Is Another Test
  USD         This Is Another Test
  USD         This Is Another Test
  </code></pre>