Gather sources for adding proper subset languages, grammars, and automaton to the Template:Formal languages and grammars. E.g. indexed, mildly context sensitive, deterministic CF, etc. Also define RE automaton column in terms of actual automaton -- Turing machine is not an automata (it's a PDA with one more stack -- find ref).
Finish categorizing Indo-Aryan languages & make sommore cats therein.
