I don't think its the responsibility of the state. It is of the startups to move out of their english speaking bubble and realise the potential of non-english speaking india.
Buying power is largely concentrated with the English speaking though, even if it isn't their first language. Most people who do not speak English are also lower on the income scale. As in less than $500 per month in income
The people who have the most purchasing power and speak English, are they bilingual or do they only speak English?
If not, could language be used as a tool for market segmentation? Give price-sensitive people lower prices to increase the size of the market without hurting the profits extracted from the wealthier people.