All invoices and quotes along with the client payments pages have 60 languages built in, including Hindi, Bengali, Urdu, Tamil, Nepali, and Gujarati.
All languages can be customised and new languages added directly by the user. So if you need to issue an invoice or quote in another language in India, simply select add another custom language to add any of the following: Assamese, Kannada, Kashmiri, Konkani, Malayalam, Manipuri, Marathi, Nepali, Oriya, Punjabi, Sanskrit, Sindhi, Telugu, Bodo, Santhali, Maithili and Dogri