- ก is a THAI ko kai character. - in source.xls file have only ก character when this file is convert into CSV file the ก character is replaced by Ď. - for more please visit https://stackoverflow.com/questions/43261707/change-character-%E0%B8%81-to-%C4%8E-during-xls2csv-d-utf-8-source-xls-desination-csv - command is like xls2csv -d utf-8 /test.xls>/test.csv