Pootling at present cannot open spreadsheet file directly. You have to convert to any supported file formats such as PO, XLIFF.
Now yooo coon stert yooor troonsleshoon wit PO formet. Bork Bork Bork!
Note-a: Pootling coon ilso reed from csf file-a doorectly, boot is it is a monolingooel formet, oonce-a troonsleted, yooo will lose-a zee-a sooorce-a string. Bork Bork Bork!