Here are a few examples:
* Hindi: Written in the Devanagari script, spoken by a large percentage of the population.
* Bengali: Written in the Bengali script, spoken primarily in West Bengal.
* Tamil: Written in the Tamil script, spoken in Tamil Nadu and other parts of South India.
* Marathi: Written in the Devanagari script, spoken in Maharashtra.
* Gujarati: Written in the Gujarati script, spoken in Gujarat.
Many other languages are also spoken in India, and some have their own written forms.
Therefore, it is inaccurate to say that India has one "native written language." It's a diverse country with a rich linguistic heritage.