[AreyBaba]

>Muslims have their own penal code!

No.

All Indians follow the same Criminal, Contract, Labor, Company, Tort, Property and Tax laws.

The only exception is Personal law (marriage, inheritance, adoption etc) where for historical reasons there were separate laws for Hindus, Muslims, Christians, Jews, Buddhists etc. These laws were codified in British India when the British came to control directly or by proxy a diverse population with diverse religions, languages and culture.

When India became an independent country, the framers of the constitution had many issues decide on in a short time and decided to punt on some contentious issues for later generations to resolve. One of them was personal law where they agreed that a uniform personal code would be desirable but left it to future generations to resolve. The other was a common national language.

Both have not been resolved. There is no uniform personal law and Hindi is not the national language.