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How to copy paste Kannada text from pdf or word doc to google translate text field?

I have a document written in Kannada both in pdf format and doc format. It is readable. But if I copy paste some text from it to the google translate text field (language set to Kannada manually), it shows garbage like”£Á£ÀÄ ªÉÄîÌAqÀ «¼Á¸”. How can we perform this copy paste successfully?