Please note that there are more than 8 communities in India.
Already there are 2 major languages at federal level. Hindi is official, but English may be used as an alternate option for communications of Indian states with the federal institutions, and this option was requested and used notably by Indian states or territories whose official regional language is not an Indo-Aryan language (like Hindi or Urdu), notably those using Dravidian languages (in the South of India), or Tibeto-Burmese and Sinitic languages (to the North-East).
And for some states there are a few other Italic or Anglo-Saxon languages kept culturally by their natives (such as French, Portuguese, and Dutch), or some creole languages based on these European languages, most of them being endangered in India and still understood by a small community or those that deal with international affairs and by immigrants or their immediate descendants and relatives that speak those languages at home).
There are already (at least) 26 other languages recognized by one or more states (either for the full state or for some of their local communities) and which are now planned in languages to preserve the very diverse Indian culture.
So this leaves at least 20 important languages that are ignored by your message to the Indian communities.
Note that India actually has hundreds languages (much more than the 28 currently recognized nationally or regionally).