This convention should be applied to any language spoken in the Indian subcontinent that is written in an Indic script. The major languages are: Assamese, Bengali, Gujarati, Hindi, Kannada, Konkani (when written in Kannada or Devanagari scripts), Malayalam, Marathi, Nepali, Oriya, Pali, Punjabi (when written in Gurmukhi script), Sanskrit, Sinhala, Tamil, Telugu.
from: Wikipedia:Naming conventions (Indic)