@AdityaK
When creating an envelope you can choose the language for each recipient individually. This will steer the email language unless the recipient has a DocuSign account. In this case it will take the language that the user has selected himself.
You can find more details on how to set this up in this DocuSign Support Article.
You will need to attach the documents in the correct language, as DocuSign does not translate or make any other changes to the documents that you process. I would recommend setting up different templates for different languages, configuring also the email language and person message in the specific language. This will enable sender’s to be more efficient and select the template in the language they require more easily.