How many scheduled official languages does India have?

How to get close to this number

Reason from linguistic diversity and constitutional practicality. A country of this size and language diversity could recognise hundreds, but a constitution has to list a number that courts and administrations can actually work with. Twenty-something is where that tension settles — enough to cover the major language communities, few enough to be governable.

The banknote detail in the explanation makes the diversity concrete: seventeen scripts printed on the currency, because the languages do not merely differ in words but in writing systems. That is a design constraint no monolingual country ever faces, and it is a better illustration of the situation than any count.

The final point is the one that reframes the whole question: neither of the two languages outsiders assume are dominant is a majority mother tongue. There is no single national language in the sense that most countries have one, and the constitutional list exists precisely because no one language could serve. A count of official languages is a count of a compromise.